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src: optimize utf-8 byte length calculation using simdutf#61601

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src: optimize utf-8 byte length calculation using simdutf#61601
mertcanaltin wants to merge 2 commits intonodejs:mainfrom
mertcanaltin:mert/stringView/buffer

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@mertcanaltin mertcanaltin commented Jan 31, 2026 •
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I used stringView in simdutf for large strings, small strings continue as they are

The benchmark result for buffers is very long, so I created a gist for this benchmark result
all results:

➜  node git:(mert/stringView/buffer) ✗ node-benchmark-compare ./result.csv
                                                                                              confidence improvement accuracy (*)    (**)   (***)
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='four_bytes'                    1.49 %       ±2.19%  ±2.95%  ±3.93%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='latin1'                        0.71 %       ±2.58%  ±3.51%  ±4.72%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='one_byte'                      0.12 %       ±2.68%  ±3.62%  ±4.83%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='three_bytes'            *      2.57 %       ±2.24%  ±3.03%  ±4.03%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='two_bytes'                    -0.03 %       ±2.96%  ±4.00%  ±5.35%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='four_bytes'                      1.25 %       ±1.81%  ±2.44%  ±3.24%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='latin1'                          0.29 %       ±1.89%  ±2.55%  ±3.39%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='one_byte'                        0.92 %       ±2.08%  ±2.80%  ±3.73%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='three_bytes'                     0.63 %       ±1.63%  ±2.19%  ±2.92%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='two_bytes'                       2.27 %       ±2.71%  ±3.66%  ±4.88%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='four_bytes'                  -0.01 %       ±2.29%  ±3.09%  ±4.12%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='latin1'                       1.14 %       ±2.18%  ±2.94%  ±3.91%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='one_byte'                     1.15 %       ±2.48%  ±3.35%  ±4.46%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='three_bytes'                  1.55 %       ±2.14%  ±2.89%  ±3.84%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='two_bytes'                    0.29 %       ±2.24%  ±3.03%  ±4.03%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='four_bytes'            ***    216.82 %      ±15.57% ±21.51% ±29.69%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='latin1'                        -0.06 %       ±1.68%  ±2.27%  ±3.02%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='one_byte'               **      2.48 %       ±1.54%  ±2.09%  ±2.78%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='three_bytes'           ***    207.83 %       ±4.55%  ±6.26%  ±8.59%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='two_bytes'             ***    210.70 %       ±5.83%  ±8.06% ±11.15%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='four_bytes'                   -0.84 %       ±2.18%  ±2.97%  ±3.98%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='latin1'                        0.65 %       ±2.09%  ±2.83%  ±3.76%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='one_byte'                      2.12 %       ±2.26%  ±3.08%  ±4.15%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='three_bytes'                   0.85 %       ±2.35%  ±3.17%  ±4.21%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='two_bytes'                     0.56 %       ±2.32%  ±3.14%  ±4.21%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='four_bytes'                     -0.01 %       ±1.83%  ±2.46%  ±3.28%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='latin1'                          0.21 %       ±1.93%  ±2.61%  ±3.48%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='one_byte'                        1.56 %       ±1.82%  ±2.46%  ±3.27%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='three_bytes'                     0.20 %       ±1.48%  ±2.00%  ±2.66%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='two_bytes'                       1.10 %       ±1.85%  ±2.49%  ±3.32%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='four_bytes'                 -1.46 %       ±2.05%  ±2.77%  ±3.68%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='latin1'               *     -4.38 %       ±4.22%  ±5.73%  ±7.68%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='one_byte'                    1.62 %       ±3.54%  ±4.85%  ±6.62%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='three_bytes'                -0.72 %       ±1.49%  ±2.01%  ±2.67%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='two_bytes'                   1.30 %       ±2.01%  ±2.71%  ±3.61%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='four_bytes'           ***    241.57 %      ±16.03% ±21.83% ±29.44%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='latin1'                       -0.11 %       ±1.49%  ±2.01%  ±2.67%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='one_byte'                      1.09 %       ±1.55%  ±2.09%  ±2.78%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='three_bytes'          ***    345.77 %      ±19.42% ±26.39% ±35.52%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='two_bytes'            ***    320.12 %      ±13.94% ±18.83% ±25.06%

Be aware that when doing many comparisons the risk of a false-positive result increases.
In this case, there are 40 comparisons, you can thus expect the following amount of false-positive results:
  2.00 false positives, when considering a   5% risk acceptance (*, **, ***),
  0.40 false positives, when considering a   1% risk acceptance (**, ***),
  0.04 false positives, when considering a 0.1% risk acceptance (***)
➜  node git:(mert/stringView/buffer) ✗

@nodejs-github-bot nodejs-github-bot added buffer Issues and PRs related to the buffer subsystem. c++ Issues and PRs that require attention from people who are familiar with C++. needs-ci PRs that need a full CI run. labels Jan 31, 2026
@mertcanaltin mertcanaltin changed the title src: optimize utf-8 length calculation for small and large strings src: optimize utf-8 byte length calculation using simdutf Jan 31, 2026
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The benchmarks show mostly regressions, no?

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mertcanaltin commented Jan 31, 2026

The benchmarks show mostly regressions, no?

I only changed the UTF-8 calculation for Buffer.byteLength(). The regression results you see may be due to the local environment. Could you run benchmark-ci for me? That way we can be more certain.

@ChALkeR ChALkeR added the performance Issues and PRs related to the performance of Node.js. label Jan 31, 2026
@mertcanaltin mertcanaltin force-pushed the mert/stringView/buffer branch 2 times, most recently from 97a81a8 to c63b474 Compare January 31, 2026 22:37
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codecov bot commented Feb 1, 2026 •
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Codecov Report

❌ Patch coverage is 69.56522% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 89.66%. Comparing base (330e3ee) to head (753dbd0).
⚠️ Report is 103 commits behind head on main.

Files with missing lines Patch % Lines
src/node_buffer.cc 69.56% 7 Missing ⚠️
Additional details and impacted files 
@@            Coverage Diff             @@
##             main   #61601      +/-   ##
==========================================
- Coverage   91.62%   89.66%   -1.97%     
==========================================
  Files         337      676     +339     
  Lines      140453   206320   +65867     
  Branches    21801    39526   +17725     
==========================================
+ Hits       128694   184999   +56305     
- Misses      11536    13450    +1914     
- Partials      223     7871    +7648
Files with missing lines Coverage Δ
src/node_buffer.cc 69.79% <69.56%> (ø)

... and 462 files with indirect coverage changes

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mertcanaltin commented Feb 1, 2026 •
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Thanks for the review @BridgeAR Pushed a fix for the regressions and updated results

issue was String::ValueView overhead eating simdutf gains on one-byte strings. Now I grab external one-byte pointers directly (zero-copy), skip simdutf for small one-byte strings (≤1024) using V8's native path, and apply full simdutf for two-byte strings after 128 bytes.

Results:
https://gist.github.com/mertcanaltin/816fdb8bb6e20d5e4f97e308db0263e9

@mertcanaltin mertcanaltin requested a review from BridgeAR February 1, 2026 14:41
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anonrig commented Feb 2, 2026

The benchmarks show mostly regressions, no?

@BridgeAR can you rereview? the benchmarks seems to be unstable enough to show differences in untriggered paths

@anonrig anonrig added the request-ci Add this label to start a Jenkins CI on a PR. label Feb 2, 2026
@github-actions github-actions bot removed the request-ci Add this label to start a Jenkins CI on a PR. label Feb 2, 2026
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nodejs-github-bot commented Feb 2, 2026

CI: https://ci.nodejs.org/job/node-test-pull-request/71160/

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mertcanaltin commented Feb 16, 2026

Hey @BridgeAR, if you're available, could you take a look at this?

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nodejs-github-bot commented Feb 27, 2026

CI: https://ci.nodejs.org/job/node-test-pull-request/71485/

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anonrig commented Feb 27, 2026

@mertcanaltin I think the PR description (and the benchmark) needs to be updated since you added a minimum threshold.

@mertcanaltin mertcanaltin force-pushed the mert/stringView/buffer branch from 3da34b6 to ef28e76 Compare March 4, 2026 05:45
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mertcanaltin commented Mar 4, 2026 •
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@anonrig Updated Pr Description, simplified the approach to only use simdutf for two-byte strings. One-byte strings delegate to V8's Utf8LengthV2 ~207-345% improvement on multi-byte

@BridgeAR regressions are resolved, could you re-review?

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BridgeAR commented Mar 4, 2026 •
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Benchmark: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1806/

Significant regressions are still present

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mertcanaltin commented Mar 5, 2026 •
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Benchmark: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1806/

@BridgeAR Thanks for the benchmark results, The regressions on small strings were caused by the extra branching overhead, the previous version had separate IsOneByte(), threshold, and simdutf checks before reaching Utf8LengthV2, which added up for short inputs (repeat=1, repeat=2).

I fixed it by combining the checks into a single condition: if (length <= kSmallStringThreshold || source->IsOneByte()). Since || short-circuits, small strings hit the length check first and go straight to V8 without any additional calls. This way we keep the fast simdutf path for large two-byte strings while small strings take the same lightweight path as before.

my local result, the solved regression:

repeat=1, two_bytes  -16.06% to +1.47% 
repeat=1, three_bytes  -17.44% to +1.52%
repeat=2, two_bytes  -19.59% to +1.86%
repeat=2, three_bytes  -10.65% to +1.06%

my all local result:

➜  node git:(mert/stringView/buffer) ✗ node-benchmark-compare ./result.csv
                                                                                              confidence improvement accuracy (*)    (**)   (***)
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='four_bytes'                   -1.60 %       ±2.24%  ±3.03%  ±4.04%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='latin1'                       -1.04 %       ±2.46%  ±3.34%  ±4.49%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='one_byte'                      0.40 %       ±1.99%  ±2.69%  ±3.57%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='three_bytes'            *     -1.79 %       ±1.67%  ±2.26%  ±3.02%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='two_bytes'                    -0.77 %       ±1.93%  ±2.60%  ±3.46%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='four_bytes'                     -0.60 %       ±4.04%  ±5.55%  ±7.59%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='latin1'                          0.39 %       ±1.45%  ±1.96%  ±2.61%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='one_byte'                        1.50 %       ±1.63%  ±2.20%  ±2.93%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='three_bytes'                     1.52 %       ±1.64%  ±2.21%  ±2.94%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='two_bytes'                *      1.47 %       ±1.37%  ±1.85%  ±2.46%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='four_bytes'                   0.10 %       ±2.07%  ±2.79%  ±3.70%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='latin1'                *     -2.04 %       ±1.84%  ±2.49%  ±3.32%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='one_byte'                     2.66 %       ±4.29%  ±5.90%  ±8.09%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='three_bytes'                  0.01 %       ±1.66%  ±2.25%  ±3.00%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='two_bytes'                    0.61 %       ±2.10%  ±2.84%  ±3.79%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='four_bytes'            ***    196.97 %       ±3.63%  ±5.00%  ±6.88%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='latin1'                        -0.05 %       ±1.43%  ±1.93%  ±2.57%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='one_byte'                *      1.77 %       ±1.41%  ±1.91%  ±2.54%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='three_bytes'           ***    208.59 %       ±5.56%  ±7.69% ±10.62%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='two_bytes'             ***    204.15 %       ±3.91%  ±5.37%  ±7.35%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='four_bytes'                   -0.01 %       ±1.68%  ±2.27%  ±3.01%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='latin1'                       -0.47 %       ±1.72%  ±2.32%  ±3.09%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='one_byte'                     -0.66 %       ±2.15%  ±2.91%  ±3.89%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='three_bytes'                  -0.61 %       ±1.53%  ±2.07%  ±2.75%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='two_bytes'                    -0.23 %       ±2.05%  ±2.76%  ±3.68%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='four_bytes'                     -0.41 %       ±1.49%  ±2.01%  ±2.69%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='latin1'                          0.28 %       ±1.54%  ±2.08%  ±2.78%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='one_byte'               ***      3.25 %       ±1.61%  ±2.17%  ±2.88%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='three_bytes'                     1.06 %       ±1.73%  ±2.34%  ±3.13%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='two_bytes'                *      1.86 %       ±1.53%  ±2.07%  ±2.78%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='four_bytes'                 -0.57 %       ±2.07%  ±2.79%  ±3.71%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='latin1'                     -2.11 %       ±2.59%  ±3.56%  ±4.90%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='one_byte'                   -1.13 %       ±2.10%  ±2.83%  ±3.77%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='three_bytes'                 0.06 %       ±3.00%  ±4.09%  ±5.54%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='two_bytes'                  -1.17 %       ±1.72%  ±2.32%  ±3.09%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='four_bytes'           ***    222.29 %       ±5.34%  ±7.38% ±10.21%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='latin1'                       -0.05 %       ±1.04%  ±1.41%  ±1.88%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='one_byte'                      0.80 %       ±1.43%  ±1.93%  ±2.59%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='three_bytes'          ***    299.53 %       ±7.37% ±10.21% ±14.14%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='two_bytes'            ***    301.01 %       ±8.69% ±12.04% ±16.70%

Be aware that when doing many comparisons the risk of a false-positive result increases.
In this case, there are 40 comparisons, you can thus expect the following amount of false-positive results:
  2.00 false positives, when considering a   5% risk acceptance (*, **, ***),
  0.40 false positives, when considering a   1% risk acceptance (**, ***),
  0.04 false positives, when considering a 0.1% risk acceptance (***)
➜  node git:(mert/stringView/buffer) ✗

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BridgeAR commented Mar 6, 2026 •
edited by aduh95
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Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1810/

Results 
confidence improvement accuracy (*)    (**)   (***)
buffers/buffer-atob.js n=1000000 size=128                                                                                                              ***      6.07 %       ±1.37%  ±1.81%  ±2.34%
buffers/buffer-atob.js n=1000000 size=16                                                                                                               ***      2.78 %       ±0.95%  ±1.25%  ±1.62%
buffers/buffer-atob.js n=1000000 size=32                                                                                                               ***      2.19 %       ±1.26%  ±1.66%  ±2.15%
buffers/buffer-atob.js n=1000000 size=64                                                                                                               ***      3.43 %       ±1.17%  ±1.55%  ±2.00%
buffers/buffer-base64-decode-wrapped.js n=32 linesCount=524288 charsPerLine=76                                                                                  0.38 %       ±0.61%  ±0.81%  ±1.05%
buffers/buffer-base64-decode.js size=8388608 n=32                                                                                                              -0.05 %       ±0.11%  ±0.15%  ±0.19%
buffers/buffer-base64-encode.js n=32 len=67108864                                                                                                              -0.02 %       ±0.06%  ±0.08%  ±0.11%
buffers/buffer-base64url-decode.js size=8388608 n=32                                                                                                            0.04 %       ±0.12%  ±0.15%  ±0.20%
buffers/buffer-base64url-encode.js n=32 len=67108864                                                                                                           -0.03 %       ±0.08%  ±0.10%  ±0.13%
buffers/buffer-btoa.js n=1000000 size=1024                                                                                                                      0.44 %       ±0.58%  ±0.77%  ±0.99%
buffers/buffer-btoa.js n=1000000 size=128                                                                                                                      -0.80 %       ±1.38%  ±1.83%  ±2.36%
buffers/buffer-btoa.js n=1000000 size=16                                                                                                               ***     -3.10 %       ±1.51%  ±1.99%  ±2.57%
buffers/buffer-btoa.js n=1000000 size=256                                                                                                                *      1.29 %       ±1.15%  ±1.52%  ±1.96%
buffers/buffer-btoa.js n=1000000 size=32                                                                                                                       -1.39 %       ±1.56%  ±2.07%  ±2.67%
buffers/buffer-btoa.js n=1000000 size=64                                                                                                                **     -2.04 %       ±1.51%  ±2.00%  ±2.58%
buffers/buffer-bytelength-buffer.js n=4000000 len=16                                                                                                            0.19 %       ±1.97%  ±2.61%  ±3.36%
buffers/buffer-bytelength-buffer.js n=4000000 len=2                                                                                                             0.96 %       ±2.26%  ±2.99%  ±3.85%
buffers/buffer-bytelength-buffer.js n=4000000 len=256                                                                                                    *     -2.19 %       ±2.06%  ±2.72%  ±3.50%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='four_bytes'                                                                      0.06 %       ±1.83%  ±2.42%  ±3.12%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='latin1'                                                                  **      2.48 %       ±1.80%  ±2.38%  ±3.08%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='one_byte'                                                                       -0.37 %       ±1.86%  ±2.46%  ±3.18%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='three_bytes'                                                                    -1.27 %       ±1.80%  ±2.38%  ±3.07%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='base64' type='two_bytes'                                                                       0.34 %       ±1.93%  ±2.55%  ±3.29%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='four_bytes'                                                               ***     -1.47 %       ±0.83%  ±1.10%  ±1.43%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='latin1'                                                                   ***      6.51 %       ±1.47%  ±1.94%  ±2.51%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='one_byte'                                                                 ***      8.83 %       ±1.21%  ±1.61%  ±2.07%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='three_bytes'                                                              ***     -5.72 %       ±1.11%  ±1.47%  ±1.89%
buffers/buffer-bytelength-string.js n=4000000 repeat=1 encoding='utf8' type='two_bytes'                                                                ***     -4.50 %       ±1.24%  ±1.64%  ±2.11%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='four_bytes'                                                                     0.51 %       ±1.79%  ±2.36%  ±3.04%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='latin1'                                                                 **      2.55 %       ±1.79%  ±2.37%  ±3.06%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='one_byte'                                                                *      1.95 %       ±1.64%  ±2.17%  ±2.80%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='three_bytes'                                                                    0.93 %       ±1.78%  ±2.36%  ±3.04%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='base64' type='two_bytes'                                                                      0.24 %       ±1.90%  ±2.51%  ±3.24%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='four_bytes'                                                              ***    199.37 %       ±1.02%  ±1.36%  ±1.77%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='latin1'                                                                   **      0.69 %       ±0.41%  ±0.54%  ±0.70%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='one_byte'                                                                ***      8.51 %       ±2.03%  ±2.68%  ±3.46%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='three_bytes'                                                             ***    111.67 %       ±1.93%  ±2.57%  ±3.34%
buffers/buffer-bytelength-string.js n=4000000 repeat=16 encoding='utf8' type='two_bytes'                                                               ***     72.98 %       ±1.57%  ±2.08%  ±2.71%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='four_bytes'                                                                      1.02 %       ±1.76%  ±2.33%  ±3.00%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='latin1'                                                                          0.85 %       ±2.06%  ±2.72%  ±3.51%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='one_byte'                                                                       -1.05 %       ±1.68%  ±2.23%  ±2.87%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='three_bytes'                                                                     0.78 %       ±1.83%  ±2.42%  ±3.11%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='base64' type='two_bytes'                                                                      -0.19 %       ±1.95%  ±2.58%  ±3.33%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='four_bytes'                                                               ***      0.88 %       ±0.51%  ±0.68%  ±0.88%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='latin1'                                                                   ***      8.15 %       ±1.74%  ±2.30%  ±2.97%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='one_byte'                                                                 ***     10.27 %       ±2.14%  ±2.83%  ±3.65%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='three_bytes'                                                              ***      2.18 %       ±0.80%  ±1.05%  ±1.36%
buffers/buffer-bytelength-string.js n=4000000 repeat=2 encoding='utf8' type='two_bytes'                                                                ***      2.52 %       ±0.94%  ±1.24%  ±1.59%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='four_bytes'                                                                    0.81 %       ±1.93%  ±2.55%  ±3.28%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='latin1'                                                                        1.69 %       ±1.69%  ±2.23%  ±2.88%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='one_byte'                                                                     -0.00 %       ±1.88%  ±2.49%  ±3.21%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='three_bytes'                                                                  -0.91 %       ±1.62%  ±2.14%  ±2.76%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='base64' type='two_bytes'                                                                     0.96 %       ±1.91%  ±2.53%  ±3.26%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='four_bytes'                                                             ***    305.35 %       ±1.08%  ±1.44%  ±1.87%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='latin1'                                                                          0.01 %       ±1.12%  ±1.48%  ±1.91%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='one_byte'                                                                        0.22 %       ±1.21%  ±1.60%  ±2.06%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='three_bytes'                                                            ***    322.25 %       ±1.07%  ±1.42%  ±1.85%
buffers/buffer-bytelength-string.js n=4000000 repeat=256 encoding='utf8' type='two_bytes'                                                              ***    209.39 %       ±0.77%  ±1.02%  ±1.33%
buffers/buffer-compare-instance-method.js n=1000000 args=1 size=16                                                                                             -0.94 %       ±2.57%  ±3.41%  ±4.39%
buffers/buffer-compare-instance-method.js n=1000000 args=1 size=16386                                                                                          -1.48 %       ±1.78%  ±2.35%  ±3.03%
buffers/buffer-compare-instance-method.js n=1000000 args=1 size=4096                                                                                           -0.78 %       ±2.34%  ±3.09%  ±3.98%
buffers/buffer-compare-instance-method.js n=1000000 args=1 size=512                                                                                             1.84 %       ±2.80%  ±3.71%  ±4.78%
buffers/buffer-compare-instance-method.js n=1000000 args=2 size=16                                                                                              1.90 %       ±2.01%  ±2.66%  ±3.43%
buffers/buffer-compare-instance-method.js n=1000000 args=2 size=16386                                                                                           0.28 %       ±3.45%  ±4.56%  ±5.88%
buffers/buffer-compare-instance-method.js n=1000000 args=2 size=4096                                                                                    **      3.00 %       ±1.94%  ±2.57%  ±3.31%
buffers/buffer-compare-instance-method.js n=1000000 args=2 size=512                                                                                            -0.14 %       ±1.91%  ±2.53%  ±3.26%
buffers/buffer-compare-instance-method.js n=1000000 args=5 size=16                                                                                             -0.64 %       ±2.40%  ±3.17%  ±4.08%
buffers/buffer-compare-instance-method.js n=1000000 args=5 size=16386                                                                                          -0.38 %       ±2.94%  ±3.89%  ±5.02%
buffers/buffer-compare-instance-method.js n=1000000 args=5 size=4096                                                                                           -0.48 %       ±1.79%  ±2.37%  ±3.05%
buffers/buffer-compare-instance-method.js n=1000000 args=5 size=512                                                                                             0.27 %       ±2.25%  ±2.97%  ±3.83%
buffers/buffer-compare-offset.js n=1000000 size=16 method='offset'                                                                                             -0.93 %       ±1.26%  ±1.66%  ±2.14%
buffers/buffer-compare-offset.js n=1000000 size=16 method='slice'                                                                                               0.19 %       ±1.20%  ±1.58%  ±2.04%
buffers/buffer-compare-offset.js n=1000000 size=16386 method='offset'                                                                                           0.54 %       ±1.30%  ±1.72%  ±2.22%
buffers/buffer-compare-offset.js n=1000000 size=16386 method='slice'                                                                                            1.15 %       ±1.35%  ±1.79%  ±2.31%
buffers/buffer-compare-offset.js n=1000000 size=4096 method='offset'                                                                                            1.17 %       ±1.55%  ±2.05%  ±2.65%
buffers/buffer-compare-offset.js n=1000000 size=4096 method='slice'                                                                                     **      1.88 %       ±1.18%  ±1.57%  ±2.02%
buffers/buffer-compare-offset.js n=1000000 size=512 method='offset'                                                                                             0.61 %       ±1.39%  ±1.84%  ±2.37%
buffers/buffer-compare-offset.js n=1000000 size=512 method='slice'                                                                                              0.83 %       ±1.20%  ±1.59%  ±2.05%
buffers/buffer-compare.js n=1000000 size=16                                                                                                                     0.01 %       ±1.51%  ±1.99%  ±2.57%
buffers/buffer-compare.js n=1000000 size=16386                                                                                                                 -0.46 %       ±0.79%  ±1.04%  ±1.36%
buffers/buffer-compare.js n=1000000 size=4096                                                                                                                  -0.71 %       ±1.56%  ±2.06%  ±2.66%
buffers/buffer-compare.js n=1000000 size=512                                                                                                                    0.75 %       ±1.21%  ±1.60%  ±2.07%
buffers/buffer-concat-fill.js n=800000 extraSize=1                                                                                                              0.22 %       ±0.75%  ±1.00%  ±1.28%
buffers/buffer-concat-fill.js n=800000 extraSize=1024                                                                                                           0.03 %       ±0.73%  ±0.96%  ±1.24%
buffers/buffer-concat-fill.js n=800000 extraSize=256                                                                                                            0.43 %       ±0.67%  ±0.89%  ±1.15%
buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=1 pieces=16                                                                                      -0.47 %       ±0.78%  ±1.03%  ±1.33%
buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=1 pieces=4                                                                                       -0.39 %       ±0.91%  ±1.21%  ±1.56%
buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=16 pieces=16                                                                                      0.09 %       ±0.69%  ±0.91%  ±1.17%
buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=16 pieces=4                                                                                      -0.52 %       ±1.32%  ±1.74%  ±2.25%
buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=256 pieces=16                                                                                     0.17 %       ±0.48%  ±0.64%  ±0.82%
buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=256 pieces=4                                                                                     -0.59 %       ±0.71%  ±0.94%  ±1.21%
buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=1 pieces=16                                                                                      -0.62 %       ±1.11%  ±1.46%  ±1.89%
buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=1 pieces=4                                                                                       -0.29 %       ±1.11%  ±1.47%  ±1.89%
buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=16 pieces=16                                                                               *      1.48 %       ±1.32%  ±1.75%  ±2.26%
buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=16 pieces=4                                                                                      -0.09 %       ±1.18%  ±1.56%  ±2.01%
buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=256 pieces=16                                                                                    -0.44 %       ±0.49%  ±0.65%  ±0.83%
buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=256 pieces=4                                                                                      0.00 %       ±0.63%  ±0.83%  ±1.07%
buffers/buffer-copy.js n=6000000 partial='false' bytes=1024                                                                                                     0.97 %       ±1.37%  ±1.82%  ±2.34%
buffers/buffer-copy.js n=6000000 partial='false' bytes=128                                                                                                     -1.87 %       ±2.27%  ±3.00%  ±3.87%
buffers/buffer-copy.js n=6000000 partial='false' bytes=8                                                                                                        2.16 %       ±2.60%  ±3.43%  ±4.43%
buffers/buffer-copy.js n=6000000 partial='true' bytes=1024                                                                                                     -0.44 %       ±0.74%  ±0.98%  ±1.27%
buffers/buffer-copy.js n=6000000 partial='true' bytes=128                                                                                                      -0.11 %       ±0.69%  ±0.91%  ±1.18%
buffers/buffer-copy.js n=6000000 partial='true' bytes=8                                                                                                         0.15 %       ±0.65%  ±0.87%  ±1.12%
buffers/buffer-creation.js n=600000 len=10 type='fast-alloc-fill'                                                                                              -2.04 %       ±3.08%  ±4.07%  ±5.25%
buffers/buffer-creation.js n=600000 len=10 type='fast-alloc'                                                                                                   -1.66 %       ±3.50%  ±4.63%  ±5.97%
buffers/buffer-creation.js n=600000 len=10 type='fast-allocUnsafe'                                                                                             -0.64 %       ±3.86%  ±5.10%  ±6.57%
buffers/buffer-creation.js n=600000 len=10 type='slow-allocUnsafe'                                                                                       *     -3.77 %       ±3.64%  ±4.81%  ±6.20%
buffers/buffer-creation.js n=600000 len=1024 type='fast-alloc-fill'                                                                                             0.37 %       ±0.54%  ±0.72%  ±0.93%
buffers/buffer-creation.js n=600000 len=1024 type='fast-alloc'                                                                                                 -0.28 %       ±0.54%  ±0.72%  ±0.92%
buffers/buffer-creation.js n=600000 len=1024 type='fast-allocUnsafe'                                                                                           -0.35 %       ±1.11%  ±1.47%  ±1.89%
buffers/buffer-creation.js n=600000 len=1024 type='slow-allocUnsafe'                                                                                     *     -0.46 %       ±0.45%  ±0.59%  ±0.76%
buffers/buffer-creation.js n=600000 len=4096 type='fast-alloc-fill'                                                                                            -0.27 %       ±0.51%  ±0.67%  ±0.87%
buffers/buffer-creation.js n=600000 len=4096 type='fast-alloc'                                                                                                 -0.52 %       ±0.52%  ±0.69%  ±0.89%
buffers/buffer-creation.js n=600000 len=4096 type='fast-allocUnsafe'                                                                                            0.01 %       ±0.54%  ±0.71%  ±0.92%
buffers/buffer-creation.js n=600000 len=4096 type='slow-allocUnsafe'                                                                                            0.13 %       ±0.61%  ±0.81%  ±1.05%
buffers/buffer-creation.js n=600000 len=8192 type='fast-alloc-fill'                                                                                            -0.06 %       ±0.52%  ±0.69%  ±0.89%
buffers/buffer-creation.js n=600000 len=8192 type='fast-alloc'                                                                                                  0.36 %       ±0.58%  ±0.77%  ±0.99%
buffers/buffer-creation.js n=600000 len=8192 type='fast-allocUnsafe'                                                                                     *      0.70 %       ±0.61%  ±0.80%  ±1.04%
buffers/buffer-creation.js n=600000 len=8192 type='slow-allocUnsafe'                                                                                            0.17 %       ±0.57%  ±0.75%  ±0.97%
buffers/buffer-equals.js n=1000000 difflen='false' size=0                                                                                                       0.33 %       ±1.48%  ±1.96%  ±2.52%
buffers/buffer-equals.js n=1000000 difflen='false' size=16386                                                                                          ***     21.02 %       ±0.20%  ±0.26%  ±0.34%
buffers/buffer-equals.js n=1000000 difflen='false' size=512                                                                                                     0.70 %       ±1.08%  ±1.43%  ±1.84%
buffers/buffer-equals.js n=1000000 difflen='true' size=0                                                                                                       -1.21 %       ±1.67%  ±2.20%  ±2.84%
buffers/buffer-equals.js n=1000000 difflen='true' size=16386                                                                                                   -0.39 %       ±1.47%  ±1.94%  ±2.50%
buffers/buffer-equals.js n=1000000 difflen='true' size=512                                                                                                     -0.26 %       ±0.67%  ±0.89%  ±1.14%
buffers/buffer-fill.js n=20000 size=65536 type='fill("")'                                                                                                      -1.21 %       ±2.32%  ±3.07%  ±3.96%
buffers/buffer-fill.js n=20000 size=65536 type='fill("t", "utf8")'                                                                                              0.77 %       ±2.42%  ±3.20%  ±4.12%
buffers/buffer-fill.js n=20000 size=65536 type='fill("t", 0, "utf8")'                                                                                          -0.78 %       ±2.53%  ±3.34%  ±4.31%
buffers/buffer-fill.js n=20000 size=65536 type='fill("t", 0)'                                                                                                  -0.13 %       ±1.29%  ±1.70%  ±2.20%
buffers/buffer-fill.js n=20000 size=65536 type='fill("t")'                                                                                                     -1.89 %       ±2.23%  ±2.94%  ±3.80%
buffers/buffer-fill.js n=20000 size=65536 type='fill("test")'                                                                                                  -1.56 %       ±2.62%  ±3.47%  ±4.47%
buffers/buffer-fill.js n=20000 size=65536 type='fill(0)'                                                                                                **     -1.69 %       ±1.13%  ±1.50%  ±1.93%
buffers/buffer-fill.js n=20000 size=65536 type='fill(100)'                                                                                              **     -1.98 %       ±1.32%  ±1.75%  ±2.26%
buffers/buffer-fill.js n=20000 size=65536 type='fill(400)'                                                                                               *     -1.63 %       ±1.25%  ±1.66%  ±2.14%
buffers/buffer-fill.js n=20000 size=65536 type='fill(Buffer.alloc(1), 0)'                                                                                      -0.87 %       ±2.22%  ±2.94%  ±3.79%
buffers/buffer-fill.js n=20000 size=8192 type='fill("")'                                                                                                        4.63 %       ±9.06% ±11.98% ±15.45%
buffers/buffer-fill.js n=20000 size=8192 type='fill("t", "utf8")'                                                                                              -3.13 %       ±7.49%  ±9.91% ±12.77%
buffers/buffer-fill.js n=20000 size=8192 type='fill("t", 0, "utf8")'                                                                                            0.90 %       ±7.38%  ±9.75% ±12.57%
buffers/buffer-fill.js n=20000 size=8192 type='fill("t", 0)'                                                                                                   -1.64 %       ±6.68%  ±8.83% ±11.38%
buffers/buffer-fill.js n=20000 size=8192 type='fill("t")'                                                                                                      -5.07 %       ±6.71%  ±8.87% ±11.44%
buffers/buffer-fill.js n=20000 size=8192 type='fill("test")'                                                                                                    0.47 %       ±7.82% ±10.35% ±13.34%
buffers/buffer-fill.js n=20000 size=8192 type='fill(0)'                                                                                                 **     -1.45 %       ±0.88%  ±1.16%  ±1.50%
buffers/buffer-fill.js n=20000 size=8192 type='fill(100)'                                                                                                       0.67 %       ±2.52%  ±3.35%  ±4.36%
buffers/buffer-fill.js n=20000 size=8192 type='fill(400)'                                                                                                      -1.64 %       ±2.48%  ±3.30%  ±4.27%
buffers/buffer-fill.js n=20000 size=8192 type='fill(Buffer.alloc(1), 0)'                                                                                **     -9.58 %       ±6.81%  ±9.01% ±11.62%
buffers/buffer-from.js n=800000 len=100 source='array'                                                                                                 ***     -4.72 %       ±0.98%  ±1.30%  ±1.68%
buffers/buffer-from.js n=800000 len=100 source='arraybuffer-middle'                                                                                      *      3.55 %       ±3.09%  ±4.09%  ±5.27%
buffers/buffer-from.js n=800000 len=100 source='arraybuffer'                                                                                                   -0.19 %       ±3.00%  ±3.97%  ±5.12%
buffers/buffer-from.js n=800000 len=100 source='buffer'                                                                                                         0.51 %       ±2.16%  ±2.86%  ±3.68%
buffers/buffer-from.js n=800000 len=100 source='object'                                                                                                         1.63 %       ±2.48%  ±3.28%  ±4.23%
buffers/buffer-from.js n=800000 len=100 source='string-base64'                                                                                                 -0.65 %       ±0.72%  ±0.95%  ±1.23%
buffers/buffer-from.js n=800000 len=100 source='string-utf8'                                                                                                   -0.81 %       ±1.52%  ±2.00%  ±2.58%
buffers/buffer-from.js n=800000 len=100 source='string'                                                                                                        -0.66 %       ±1.44%  ±1.91%  ±2.46%
buffers/buffer-from.js n=800000 len=100 source='uint16array'                                                                                                    0.02 %       ±1.45%  ±1.91%  ±2.46%
buffers/buffer-from.js n=800000 len=100 source='uint8array'                                                                                                     0.83 %       ±2.18%  ±2.88%  ±3.71%
buffers/buffer-from.js n=800000 len=2048 source='array'                                                                                                ***      0.47 %       ±0.19%  ±0.25%  ±0.32%
buffers/buffer-from.js n=800000 len=2048 source='arraybuffer-middle'                                                                                            1.36 %       ±2.69%  ±3.56%  ±4.59%
buffers/buffer-from.js n=800000 len=2048 source='arraybuffer'                                                                                                   1.85 %       ±3.17%  ±4.20%  ±5.41%
buffers/buffer-from.js n=800000 len=2048 source='buffer'                                                                                                       -0.08 %       ±0.72%  ±0.95%  ±1.23%
buffers/buffer-from.js n=800000 len=2048 source='object'                                                                                                        0.00 %       ±3.04%  ±4.01%  ±5.17%
buffers/buffer-from.js n=800000 len=2048 source='string-base64'                                                                                                -0.49 %       ±0.55%  ±0.72%  ±0.93%
buffers/buffer-from.js n=800000 len=2048 source='string-utf8'                                                                                                   0.26 %       ±0.65%  ±0.86%  ±1.11%
buffers/buffer-from.js n=800000 len=2048 source='string'                                                                                                       -0.10 %       ±0.55%  ±0.73%  ±0.94%
buffers/buffer-from.js n=800000 len=2048 source='uint16array'                                                                                                  -0.23 %       ±0.58%  ±0.77%  ±0.99%
buffers/buffer-from.js n=800000 len=2048 source='uint8array'                                                                                                   -0.47 %       ±0.68%  ±0.89%  ±1.15%
buffers/buffer-hex-decode.js n=1000000 len=1024                                                                                                                -0.27 %       ±0.47%  ±0.63%  ±0.81%
buffers/buffer-hex-decode.js n=1000000 len=64                                                                                                                   0.21 %       ±1.37%  ±1.81%  ±2.33%
buffers/buffer-hex-encode.js n=1000000 len=1024                                                                                                        ***     -0.20 %       ±0.08%  ±0.11%  ±0.14%
buffers/buffer-hex-encode.js n=1000000 len=64                                                                                                                  -0.36 %       ±0.62%  ±0.82%  ±1.06%
buffers/buffer-indexof-number.js n=1000000 value=64                                                                                                            -0.82 %       ±2.18%  ±2.88%  ±3.71%
buffers/buffer-indexof.js n=50000 type='buffer' encoding='undefined' search='--l'                                                                              -0.09 %       ±0.25%  ±0.34%  ±0.43%
buffers/buffer-indexof.js n=50000 type='buffer' encoding='undefined' search='@'                                                                                -2.86 %       ±6.90%  ±9.12% ±11.75%
buffers/buffer-indexof.js n=50000 type='buffer' encoding='undefined' search='</i> to the Caterpillar'                                                  ***      0.55 %       ±0.03%  ±0.04%  ±0.06%
buffers/buffer-indexof.js n=50000 type='buffer' encoding='undefined' search='aaaaaaaaaaaaaaaaa'                                                        ***      3.14 %       ±0.05%  ±0.07%  ±0.09%
buffers/buffer-indexof.js n=50000 type='buffer' encoding='undefined' search='Alice'                                                                             1.15 %       ±9.38% ±12.40% ±15.99%
buffers/buffer-indexof.js n=50000 type='buffer' encoding='undefined' search='found it very'                                                            ***      0.22 %       ±0.02%  ±0.03%  ±0.04%
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buffers/buffer-iterate.js n=1000 method='for' type='fast' size=4096                                                                                             5.08 %       ±6.48%  ±8.57% ±11.05%
buffers/buffer-iterate.js n=1000 method='for' type='fast' size=512                                                                                             -9.03 %      ±11.58% ±15.31% ±19.73%
buffers/buffer-iterate.js n=1000 method='forOf' type='fast' size=16386                                                                                          0.04 %       ±0.89%  ±1.18%  ±1.52%
buffers/buffer-iterate.js n=1000 method='forOf' type='fast' size=4096                                                                                           0.34 %       ±3.45%  ±4.56%  ±5.88%
buffers/buffer-iterate.js n=1000 method='forOf' type='fast' size=512                                                                                            1.29 %       ±8.65% ±11.43% ±14.74%
buffers/buffer-iterate.js n=1000 method='iterator' type='fast' size=16386                                                                                       0.14 %       ±0.85%  ±1.12%  ±1.45%
buffers/buffer-iterate.js n=1000 method='iterator' type='fast' size=4096                                                                                       -0.66 %       ±2.15%  ±2.84%  ±3.66%
buffers/buffer-iterate.js n=1000 method='iterator' type='fast' size=512                                                                                         0.37 %       ±7.78% ±10.29% ±13.27%
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buffers/buffer-normalize-encoding.js n=1000000 encoding='BASE64'                                                                                               -0.73 %       ±2.46%  ±3.25%  ±4.19%
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buffers/buffer-normalize-encoding.js n=1000000 encoding='UCS2'                                                                                                  0.22 %       ±2.78%  ±3.67%  ±4.73%
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buffers/buffer-normalize-encoding.js n=1000000 encoding='utf-8'                                                                                                 0.03 %       ±0.78%  ±1.03%  ±1.33%
buffers/buffer-normalize-encoding.js n=1000000 encoding='utf16le'                                                                                              -0.86 %       ±1.59%  ±2.11%  ±2.73%
buffers/buffer-normalize-encoding.js n=1000000 encoding='UTF16LE'                                                                                              -0.62 %       ±3.11%  ±4.12%  ±5.31%
buffers/buffer-normalize-encoding.js n=1000000 encoding='utf8'                                                                                                 -1.21 %       ±1.86%  ±2.47%  ±3.20%
buffers/buffer-normalize-encoding.js n=1000000 encoding='UTF8'                                                                                                 -1.43 %       ±1.76%  ±2.33%  ±3.01%
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buffers/buffer-read-with-byteLength.js byteLength=4 n=1000000 type='IntLE' buffer='fast'                                                                        7.13 %      ±10.74% ±14.20% ±18.31%
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buffers/buffer-read-with-byteLength.js byteLength=5 n=1000000 type='IntLE' buffer='fast'                                                                        1.06 %       ±9.58% ±12.67% ±16.33%
buffers/buffer-read-with-byteLength.js byteLength=5 n=1000000 type='UIntBE' buffer='fast'                                                                      -6.43 %       ±8.85% ±11.71% ±15.09%
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buffers/buffer-read.js n=1000000 type='BigUInt64BE' buffer='fast'                                                                                               1.74 %      ±12.19% ±16.11% ±20.77%
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buffers/buffer-read.js n=1000000 type='Int8' buffer='fast'                                                                                                     -5.64 %      ±15.17% ±20.06% ±25.85%
buffers/buffer-read.js n=1000000 type='UInt16BE' buffer='fast'                                                                                                 -5.37 %      ±15.05% ±19.90% ±25.65%
buffers/buffer-read.js n=1000000 type='UInt16LE' buffer='fast'                                                                                                -11.82 %      ±13.88% ±18.35% ±23.66%
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buffers/buffer-read.js n=1000000 type='UInt8' buffer='fast'                                                                                            ***    -21.37 %      ±12.07% ±15.95% ±20.56%
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buffers/buffer-slice.js n=1000000 type='slow'                                                                                                                  -0.89 %       ±3.09%  ±4.09%  ±5.27%
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buffers/buffer-swap.js n=1000000 len=1024 method='swap32' aligned='true'                                                                                        0.18 %       ±0.46%  ±0.60%  ±0.78%
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buffers/buffer-swap.js n=1000000 len=2056 method='swap16' aligned='true'                                                                                       -0.13 %       ±0.59%  ±0.78%  ±1.00%
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buffers/buffer-swap.js n=1000000 len=2056 method='swap32' aligned='true'                                                                                        0.10 %       ±0.20%  ±0.26%  ±0.34%
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buffers/buffer-swap.js n=1000000 len=2056 method='swap64' aligned='true'                                                                                 *      0.27 %       ±0.24%  ±0.31%  ±0.40%
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buffers/buffer-swap.js n=1000000 len=256 method='swap16' aligned='true'                                                                                        -0.05 %       ±1.45%  ±1.91%  ±2.47%
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buffers/buffer-swap.js n=1000000 len=256 method='swap64' aligned='true'                                                                                        -0.29 %       ±1.14%  ±1.50%  ±1.94%
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buffers/buffer-swap.js n=1000000 len=768 method='swap64' aligned='true'                                                                                 **      0.95 %       ±0.63%  ±0.83%  ±1.07%
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buffers/buffer-swap.js n=1000000 len=8192 method='swap32' aligned='true'                                                                                       -0.04 %       ±0.05%  ±0.07%  ±0.09%
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buffers/buffer-tojson.js len=256 n=10000                                                                                                                       -2.05 %       ±2.58%  ±3.42%  ±4.44%
buffers/buffer-tojson.js len=4096 n=10000                                                                                                                      -0.64 %       ±1.23%  ±1.62%  ±2.09%
buffers/buffer-tostring.js n=1000000 len=1 args=0 encoding=''                                                                                                   0.15 %       ±2.09%  ±2.77%  ±3.57%
buffers/buffer-tostring.js n=1000000 len=1 args=1 encoding='ascii'                                                                                       *     -2.36 %       ±1.80%  ±2.37%  ±3.06%
buffers/buffer-tostring.js n=1000000 len=1 args=1 encoding='hex'                                                                                         *      1.77 %       ±1.77%  ±2.34%  ±3.02%
buffers/buffer-tostring.js n=1000000 len=1 args=1 encoding='latin1'                                                                                             0.00 %       ±2.98%  ±3.93%  ±5.07%
buffers/buffer-tostring.js n=1000000 len=1 args=1 encoding='UCS-2'                                                                                              0.56 %       ±1.14%  ±1.51%  ±1.95%
buffers/buffer-tostring.js n=1000000 len=1 args=1 encoding='utf8'                                                                                               0.26 %       ±2.03%  ±2.68%  ±3.46%
buffers/buffer-tostring.js n=1000000 len=1 args=3 encoding='ascii'                                                                                              0.01 %       ±2.27%  ±3.00%  ±3.86%
buffers/buffer-tostring.js n=1000000 len=1 args=3 encoding='hex'                                                                                       ***      3.72 %       ±1.92%  ±2.53%  ±3.26%
buffers/buffer-tostring.js n=1000000 len=1 args=3 encoding='latin1'                                                                                            -0.96 %       ±2.01%  ±2.66%  ±3.43%
buffers/buffer-tostring.js n=1000000 len=1 args=3 encoding='UCS-2'                                                                                             -0.35 %       ±1.12%  ±1.48%  ±1.91%
buffers/buffer-tostring.js n=1000000 len=1 args=3 encoding='utf8'                                                                                              -0.34 %       ±1.77%  ±2.34%  ±3.01%
buffers/buffer-tostring.js n=1000000 len=1024 args=0 encoding=''                                                                                        **     -1.69 %       ±1.01%  ±1.33%  ±1.72%
buffers/buffer-tostring.js n=1000000 len=1024 args=1 encoding='ascii'                                                                                    *     -1.09 %       ±0.83%  ±1.10%  ±1.42%
buffers/buffer-tostring.js n=1000000 len=1024 args=1 encoding='hex'                                                                                    ***     -0.94 %       ±0.48%  ±0.64%  ±0.82%
buffers/buffer-tostring.js n=1000000 len=1024 args=1 encoding='latin1'                                                                                         -0.11 %       ±1.02%  ±1.35%  ±1.74%
buffers/buffer-tostring.js n=1000000 len=1024 args=1 encoding='UCS-2'                                                                                  ***     -1.81 %       ±0.74%  ±0.97%  ±1.26%
buffers/buffer-tostring.js n=1000000 len=1024 args=1 encoding='utf8'                                                                                   ***     -1.26 %       ±0.66%  ±0.88%  ±1.13%
buffers/buffer-tostring.js n=1000000 len=1024 args=3 encoding='ascii'                                                                                  ***     -1.35 %       ±0.70%  ±0.92%  ±1.19%
buffers/buffer-tostring.js n=1000000 len=1024 args=3 encoding='hex'                                                                                             0.05 %       ±0.39%  ±0.52%  ±0.67%
buffers/buffer-tostring.js n=1000000 len=1024 args=3 encoding='latin1'                                                                                          0.21 %       ±0.88%  ±1.16%  ±1.50%
buffers/buffer-tostring.js n=1000000 len=1024 args=3 encoding='UCS-2'                                                                                  ***     -2.14 %       ±0.71%  ±0.94%  ±1.21%
buffers/buffer-tostring.js n=1000000 len=1024 args=3 encoding='utf8'                                                                                           -0.26 %       ±0.77%  ±1.02%  ±1.31%
buffers/buffer-tostring.js n=1000000 len=64 args=0 encoding=''                                                                                                 -0.44 %       ±1.17%  ±1.55%  ±2.01%
buffers/buffer-tostring.js n=1000000 len=64 args=1 encoding='ascii'                                                                                             1.24 %       ±2.14%  ±2.84%  ±3.68%
buffers/buffer-tostring.js n=1000000 len=64 args=1 encoding='hex'                                                                                               0.63 %       ±1.52%  ±2.01%  ±2.60%
buffers/buffer-tostring.js n=1000000 len=64 args=1 encoding='latin1'                                                                                           -0.36 %       ±2.02%  ±2.68%  ±3.45%
buffers/buffer-tostring.js n=1000000 len=64 args=1 encoding='UCS-2'                                                                                    ***     -2.30 %       ±1.22%  ±1.61%  ±2.08%
buffers/buffer-tostring.js n=1000000 len=64 args=1 encoding='utf8'                                                                                              0.55 %       ±1.28%  ±1.69%  ±2.18%
buffers/buffer-tostring.js n=1000000 len=64 args=3 encoding='ascii'                                                                                            -1.29 %       ±1.45%  ±1.91%  ±2.46%
buffers/buffer-tostring.js n=1000000 len=64 args=3 encoding='hex'                                                                                               1.21 %       ±1.45%  ±1.92%  ±2.47%
buffers/buffer-tostring.js n=1000000 len=64 args=3 encoding='latin1'                                                                                            0.82 %       ±1.61%  ±2.13%  ±2.75%
buffers/buffer-tostring.js n=1000000 len=64 args=3 encoding='UCS-2'                                                                                            -0.15 %       ±1.16%  ±1.53%  ±1.97%
buffers/buffer-tostring.js n=1000000 len=64 args=3 encoding='utf8'                                                                                              1.25 %       ±1.60%  ±2.12%  ±2.73%
buffers/buffer-transcode.js n=100000 length=1 toEncoding='ascii' fromEncoding='ascii'                                                                          -0.40 %       ±1.09%  ±1.44%  ±1.86%
buffers/buffer-transcode.js n=100000 length=1 toEncoding='ascii' fromEncoding='latin1'                                                                  **     -1.47 %       ±0.90%  ±1.19%  ±1.53%
buffers/buffer-transcode.js n=100000 length=1 toEncoding='ascii' fromEncoding='ucs2'                                                                            0.81 %       ±1.55%  ±2.05%  ±2.64%
buffers/buffer-transcode.js n=100000 length=1 toEncoding='ascii' fromEncoding='utf8'                                                                           -1.00 %       ±1.18%  ±1.56%  ±2.01%
buffers/buffer-transcode.js n=100000 length=1 toEncoding='latin1' fromEncoding='ascii'                                                                         -0.16 %       ±0.95%  ±1.25%  ±1.62%
buffers/buffer-transcode.js n=100000 length=1 toEncoding='latin1' fromEncoding='latin1'                                                                 **     -1.24 %       ±0.89%  ±1.18%  ±1.52%
buffers/buffer-transcode.js n=100000 length=1 toEncoding='latin1' fromEncoding='ucs2'                                                                           0.46 %       ±1.33%  ±1.76%  ±2.26%
buffers/buffer-transcode.js n=100000 length=1 toEncoding='latin1' fromEncoding='utf8'                                                                    *     -1.25 %       ±1.18%  ±1.56%  ±2.01%
buffers/buffer-transcode.js n=100000 length=1 toEncoding='ucs2' fromEncoding='ascii'                                                                            0.14 %       ±1.33%  ±1.75%  ±2.26%
buffers/buffer-transcode.js n=100000 length=1 toEncoding='ucs2' fromEncoding='latin1'                                                                           1.24 %       ±1.37%  ±1.81%  ±2.33%
buffers/buffer-transcode.js n=100000 length=1 toEncoding='ucs2' fromEncoding='ucs2'                                                                    ***     -3.23 %       ±1.05%  ±1.39%  ±1.79%
buffers/buffer-transcode.js n=100000 length=1 toEncoding='ucs2' fromEncoding='utf8'                                                                            -0.51 %       ±1.27%  ±1.67%  ±2.16%
buffers/buffer-transcode.js n=100000 length=1 toEncoding='utf8' fromEncoding='ascii'                                                                           -0.02 %       ±0.94%  ±1.25%  ±1.61%
buffers/buffer-transcode.js n=100000 length=1 toEncoding='utf8' fromEncoding='latin1'                                                                  ***     -1.89 %       ±0.89%  ±1.18%  ±1.52%
buffers/buffer-transcode.js n=100000 length=1 toEncoding='utf8' fromEncoding='utf8'                                                                     **     -1.25 %       ±0.94%  ±1.24%  ±1.60%
buffers/buffer-transcode.js n=100000 length=10 toEncoding='ascii' fromEncoding='ascii'                                                                   *     -1.37 %       ±1.15%  ±1.53%  ±1.97%
buffers/buffer-transcode.js n=100000 length=10 toEncoding='ascii' fromEncoding='latin1'                                                                         0.26 %       ±1.06%  ±1.40%  ±1.81%
buffers/buffer-transcode.js n=100000 length=10 toEncoding='ascii' fromEncoding='ucs2'                                                                    *     -1.30 %       ±1.02%  ±1.35%  ±1.74%
buffers/buffer-transcode.js n=100000 length=10 toEncoding='ascii' fromEncoding='utf8'                                                                          -0.11 %       ±1.14%  ±1.50%  ±1.94%
buffers/buffer-transcode.js n=100000 length=10 toEncoding='latin1' fromEncoding='ascii'                                                                  *     -1.27 %       ±1.20%  ±1.59%  ±2.05%
buffers/buffer-transcode.js n=100000 length=10 toEncoding='latin1' fromEncoding='latin1'                                                                **     -1.26 %       ±0.81%  ±1.07%  ±1.38%
buffers/buffer-transcode.js n=100000 length=10 toEncoding='latin1' fromEncoding='ucs2'                                                                         -0.56 %       ±1.06%  ±1.40%  ±1.81%
buffers/buffer-transcode.js n=100000 length=10 toEncoding='latin1' fromEncoding='utf8'                                                                         -0.96 %       ±1.07%  ±1.42%  ±1.83%
buffers/buffer-transcode.js n=100000 length=10 toEncoding='ucs2' fromEncoding='ascii'                                                                    *      1.40 %       ±1.22%  ±1.61%  ±2.08%
buffers/buffer-transcode.js n=100000 length=10 toEncoding='ucs2' fromEncoding='latin1'                                                                          0.89 %       ±1.30%  ±1.71%  ±2.21%
buffers/buffer-transcode.js n=100000 length=10 toEncoding='ucs2' fromEncoding='ucs2'                                                                           -0.59 %       ±1.15%  ±1.52%  ±1.97%
buffers/buffer-transcode.js n=100000 length=10 toEncoding='ucs2' fromEncoding='utf8'                                                                            0.24 %       ±1.29%  ±1.70%  ±2.20%
buffers/buffer-transcode.js n=100000 length=10 toEncoding='utf8' fromEncoding='ascii'                                                                           0.28 %       ±1.09%  ±1.44%  ±1.85%
buffers/buffer-transcode.js n=100000 length=10 toEncoding='utf8' fromEncoding='latin1'                                                                  **     -1.80 %       ±1.14%  ±1.51%  ±1.94%
buffers/buffer-transcode.js n=100000 length=10 toEncoding='utf8' fromEncoding='utf8'                                                                            0.45 %       ±1.37%  ±1.81%  ±2.33%
buffers/buffer-transcode.js n=100000 length=1000 toEncoding='ascii' fromEncoding='ascii'                                                                       -0.29 %       ±0.77%  ±1.02%  ±1.31%
buffers/buffer-transcode.js n=100000 length=1000 toEncoding='ascii' fromEncoding='latin1'                                                                      -0.45 %       ±0.85%  ±1.12%  ±1.44%
buffers/buffer-transcode.js n=100000 length=1000 toEncoding='ascii' fromEncoding='ucs2'                                                                ***      3.00 %       ±0.34%  ±0.45%  ±0.58%
buffers/buffer-transcode.js n=100000 length=1000 toEncoding='ascii' fromEncoding='utf8'                                                                  *     -1.16 %       ±0.88%  ±1.17%  ±1.51%
buffers/buffer-transcode.js n=100000 length=1000 toEncoding='latin1' fromEncoding='ascii'                                                                      -0.10 %       ±0.77%  ±1.01%  ±1.31%
buffers/buffer-transcode.js n=100000 length=1000 toEncoding='latin1' fromEncoding='latin1'                                                                      0.09 %       ±0.78%  ±1.03%  ±1.33%
buffers/buffer-transcode.js n=100000 length=1000 toEncoding='latin1' fromEncoding='ucs2'                                                               ***      1.00 %       ±0.30%  ±0.40%  ±0.52%
buffers/buffer-transcode.js n=100000 length=1000 toEncoding='latin1' fromEncoding='utf8'                                                                 *     -1.00 %       ±0.79%  ±1.05%  ±1.35%
buffers/buffer-transcode.js n=100000 length=1000 toEncoding='ucs2' fromEncoding='ascii'                                                                        -0.52 %       ±0.75%  ±0.99%  ±1.28%
buffers/buffer-transcode.js n=100000 length=1000 toEncoding='ucs2' fromEncoding='latin1'                                                                        0.05 %       ±0.71%  ±0.94%  ±1.21%
buffers/buffer-transcode.js n=100000 length=1000 toEncoding='ucs2' fromEncoding='ucs2'                                                                 ***     -0.91 %       ±0.50%  ±0.66%  ±0.84%
buffers/buffer-transcode.js n=100000 length=1000 toEncoding='ucs2' fromEncoding='utf8'                                                                          0.05 %       ±0.64%  ±0.85%  ±1.10%
buffers/buffer-transcode.js n=100000 length=1000 toEncoding='utf8' fromEncoding='ascii'                                                                  *     -0.62 %       ±0.50%  ±0.66%  ±0.85%
buffers/buffer-transcode.js n=100000 length=1000 toEncoding='utf8' fromEncoding='latin1'                                                                       -0.17 %       ±0.48%  ±0.64%  ±0.83%
buffers/buffer-transcode.js n=100000 length=1000 toEncoding='utf8' fromEncoding='utf8'                                                                  **      1.01 %       ±0.62%  ±0.82%  ±1.06%
buffers/buffer-write-string-short.js n=1000000 len=1 encoding='ascii'                                                                                           1.49 %       ±2.53%  ±3.35%  ±4.31%
buffers/buffer-write-string-short.js n=1000000 len=1 encoding='latin1'                                                                                          2.33 %       ±2.56%  ±3.39%  ±4.37%
buffers/buffer-write-string-short.js n=1000000 len=1 encoding='utf8'                                                                                    **      2.20 %       ±1.62%  ±2.14%  ±2.76%
buffers/buffer-write-string-short.js n=1000000 len=16 encoding='ascii'                                                                                  **      3.85 %       ±2.49%  ±3.29%  ±4.25%
buffers/buffer-write-string-short.js n=1000000 len=16 encoding='latin1'                                                                                         2.05 %       ±3.00%  ±3.96%  ±5.11%
buffers/buffer-write-string-short.js n=1000000 len=16 encoding='utf8'                                                                                           2.41 %       ±2.59%  ±3.42%  ±4.41%
buffers/buffer-write-string-short.js n=1000000 len=32 encoding='ascii'                                                                                          2.21 %       ±2.24%  ±2.96%  ±3.82%
buffers/buffer-write-string-short.js n=1000000 len=32 encoding='latin1'                                                                                        -0.42 %       ±2.62%  ±3.47%  ±4.47%
buffers/buffer-write-string-short.js n=1000000 len=32 encoding='utf8'                                                                                           2.45 %       ±2.48%  ±3.28%  ±4.22%
buffers/buffer-write-string-short.js n=1000000 len=8 encoding='ascii'                                                                                    *      3.07 %       ±2.73%  ±3.61%  ±4.66%
buffers/buffer-write-string-short.js n=1000000 len=8 encoding='latin1'                                                                                          1.21 %       ±2.58%  ±3.42%  ±4.41%
buffers/buffer-write-string-short.js n=1000000 len=8 encoding='utf8'                                                                                            2.02 %       ±2.06%  ±2.72%  ±3.51%
buffers/buffer-write-string.js n=1000000 len=2048 args='' encoding=''                                                                                           0.03 %       ±0.20%  ±0.26%  ±0.34%
buffers/buffer-write-string.js n=1000000 len=2048 args='' encoding='ascii'                                                                                      0.47 %       ±0.77%  ±1.02%  ±1.32%
buffers/buffer-write-string.js n=1000000 len=2048 args='' encoding='hex'                                                                                **      0.11 %       ±0.08%  ±0.11%  ±0.14%
buffers/buffer-write-string.js n=1000000 len=2048 args='' encoding='latin1'                                                                                     0.27 %       ±0.93%  ±1.23%  ±1.59%
buffers/buffer-write-string.js n=1000000 len=2048 args='' encoding='utf16le'                                                                             *      1.03 %       ±0.79%  ±1.05%  ±1.35%
buffers/buffer-write-string.js n=1000000 len=2048 args='' encoding='utf8'                                                                              ***      1.40 %       ±0.57%  ±0.76%  ±0.98%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset' encoding=''                                                                                    -0.29 %       ±0.87%  ±1.15%  ±1.48%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset' encoding='ascii'                                                                                0.56 %       ±2.96%  ±3.91%  ±5.04%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset' encoding='hex'                                                                                  0.20 %       ±0.28%  ±0.37%  ±0.48%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset' encoding='latin1'                                                                               0.71 %       ±2.75%  ±3.63%  ±4.69%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset' encoding='utf16le'                                                                       *      1.61 %       ±1.57%  ±2.08%  ±2.69%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset' encoding='utf8'                                                                          *      1.25 %       ±0.96%  ±1.27%  ±1.63%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset+length' encoding=''                                                                             -0.24 %       ±0.57%  ±0.75%  ±0.97%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset+length' encoding='ascii'                                                                        -0.10 %       ±2.49%  ±3.29%  ±4.24%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset+length' encoding='hex'                                                                          -0.04 %       ±0.13%  ±0.17%  ±0.22%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset+length' encoding='latin1'                                                                        0.44 %       ±2.24%  ±2.97%  ±3.83%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset+length' encoding='utf16le'                                                              ***      2.20 %       ±1.24%  ±1.64%  ±2.11%
buffers/buffer-write-string.js n=1000000 len=2048 args='offset+length' encoding='utf8'                                                                         -0.13 %       ±0.76%  ±1.01%  ±1.30%
buffers/buffer-write.js n=1000000 type='BigInt64BE' buffer='fast'                                                                                              -0.15 %       ±1.46%  ±1.93%  ±2.49%
buffers/buffer-write.js n=1000000 type='BigInt64LE' buffer='fast'                                                                                              -0.81 %       ±1.19%  ±1.58%  ±2.03%
buffers/buffer-write.js n=1000000 type='BigUInt64BE' buffer='fast'                                                                                             -1.06 %       ±1.38%  ±1.83%  ±2.36%
buffers/buffer-write.js n=1000000 type='BigUInt64LE' buffer='fast'                                                                                      **     -1.76 %       ±1.18%  ±1.56%  ±2.01%
buffers/buffer-write.js n=1000000 type='DoubleBE' buffer='fast'                                                                                                 2.22 %       ±9.00% ±11.90% ±15.34%
buffers/buffer-write.js n=1000000 type='DoubleLE' buffer='fast'                                                                                                 1.35 %       ±9.18% ±12.13% ±15.64%
buffers/buffer-write.js n=1000000 type='FloatBE' buffer='fast'                                                                                                 -1.53 %      ±11.45% ±15.13% ±19.51%
buffers/buffer-write.js n=1000000 type='FloatLE' buffer='fast'                                                                                                  3.21 %      ±11.49% ±15.20% ±19.59%
buffers/buffer-write.js n=1000000 type='Int16BE' buffer='fast'                                                                                                 -4.43 %       ±9.91% ±13.11% ±16.90%
buffers/buffer-write.js n=1000000 type='Int16LE' buffer='fast'                                                                                                 -9.43 %      ±10.06% ±13.30% ±17.14%
buffers/buffer-write.js n=1000000 type='Int32BE' buffer='fast'                                                                                                  3.78 %      ±12.57% ±16.62% ±21.43%
buffers/buffer-write.js n=1000000 type='Int32LE' buffer='fast'                                                                                                 10.68 %      ±13.18% ±17.42% ±22.46%
buffers/buffer-write.js n=1000000 type='Int8' buffer='fast'                                                                                              *     -7.04 %       ±6.72%  ±8.88% ±11.45%
buffers/buffer-write.js n=1000000 type='IntBE' buffer='fast'                                                                                                   -3.08 %       ±6.77%  ±8.95% ±11.54%
buffers/buffer-write.js n=1000000 type='IntLE' buffer='fast'                                                                                                   -6.37 %       ±7.16%  ±9.46% ±12.20%
buffers/buffer-write.js n=1000000 type='UInt16BE' buffer='fast'                                                                                                 0.07 %      ±10.55% ±13.95% ±17.99%
buffers/buffer-write.js n=1000000 type='UInt16LE' buffer='fast'                                                                                                 0.20 %      ±10.68% ±14.12% ±18.21%
buffers/buffer-write.js n=1000000 type='UInt32BE' buffer='fast'                                                                                                -6.04 %       ±8.52% ±11.26% ±14.52%
buffers/buffer-write.js n=1000000 type='UInt32LE' buffer='fast'                                                                                                 2.93 %       ±8.60% ±11.37% ±14.66%
buffers/buffer-write.js n=1000000 type='UInt8' buffer='fast'                                                                                                   10.91 %      ±11.31% ±14.95% ±19.27%
buffers/buffer-write.js n=1000000 type='UIntBE' buffer='fast'                                                                                                   0.76 %       ±8.96% ±11.85% ±15.27%
buffers/buffer-write.js n=1000000 type='UIntLE' buffer='fast'                                                                                                  -3.33 %       ±8.55% ±11.31% ±14.57%
buffers/buffer-zero.js type='buffer' n=1000000                                                                                                                  0.21 %       ±1.55%  ±2.05%  ±2.65%
buffers/buffer-zero.js type='string' n=1000000                                                                                                                 -0.98 %       ±2.42%  ±3.20%  ±4.13%
buffers/dataview-set.js n=1000000 type='Float32BE'                                                                                                             -1.36 %       ±3.55%  ±4.70%  ±6.07%
buffers/dataview-set.js n=1000000 type='Float32LE'                                                                                                              0.33 %       ±3.70%  ±4.89%  ±6.30%
buffers/dataview-set.js n=1000000 type='Float64BE'                                                                                                             -0.39 %       ±3.78%  ±5.00%  ±6.45%
buffers/dataview-set.js n=1000000 type='Float64LE'                                                                                                      **     -5.63 %       ±3.67%  ±4.87%  ±6.29%
buffers/dataview-set.js n=1000000 type='Int16BE'                                                                                                               -1.19 %       ±2.84%  ±3.76%  ±4.84%
buffers/dataview-set.js n=1000000 type='Int16LE'                                                                                                               -0.75 %       ±2.68%  ±3.54%  ±4.56%
buffers/dataview-set.js n=1000000 type='Int32BE'                                                                                                                0.22 %       ±2.25%  ±2.98%  ±3.84%
buffers/dataview-set.js n=1000000 type='Int32LE'                                                                                                               -1.38 %       ±2.17%  ±2.87%  ±3.69%
buffers/dataview-set.js n=1000000 type='Int8'                                                                                                                  -0.38 %       ±2.24%  ±2.97%  ±3.84%
buffers/dataview-set.js n=1000000 type='Uint16BE'                                                                                                              -1.44 %       ±2.47%  ±3.27%  ±4.21%
buffers/dataview-set.js n=1000000 type='Uint16LE'                                                                                                              -2.42 %       ±2.52%  ±3.34%  ±4.30%
buffers/dataview-set.js n=1000000 type='Uint32BE'                                                                                                               0.49 %       ±2.14%  ±2.83%  ±3.66%
buffers/dataview-set.js n=1000000 type='Uint32LE'                                                                                                               0.22 %       ±1.44%  ±1.90%  ±2.45%
buffers/dataview-set.js n=1000000 type='Uint8'                                                                                                                  1.02 %       ±2.38%  ±3.14%  ±4.05%

Be aware that when doing many comparisons the risk of a false-positive
result increases. In this case, there are 471 comparisons, you can thus
expect the following amount of false-positive results:
  23.55 false positives, when considering a   5% risk acceptance (*, **, ***),
  4.71 false positives, when considering a   1% risk acceptance (**, ***),
  0.47 false positives, when considering a 0.1% risk acceptance (***)

@mertcanaltin
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mertcanaltin commented Mar 8, 2026 •
edited
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https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1810/

Thanks for re-running,

I searching now how to solve regression for small string and, this need a extra branch (if condition) but this is a to mean regression for small strings (repeat=1), because I need this question, (this string is big?), this to mean extra branch

only have a alternative, use has v8 Utf8LengthV2, I will try create issue for small strings simdutf use in V8

@mertcanaltin mertcanaltin mentioned this pull request Mar 20, 2026
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@mertcanaltin mertcanaltin mentioned this pull request Mar 20, 2026
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mertcanaltin commented Mar 20, 2026

Instead, we backported it to V8, so I'm closing this pr.

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@anonrig anonrig anonrig approved these changes

@aduh95 aduh95 aduh95 approved these changes

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buffer Issues and PRs related to the buffer subsystem. c++ Issues and PRs that require attention from people who are familiar with C++. needs-ci PRs that need a full CI run. performance Issues and PRs related to the performance of Node.js.

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