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buffer: improve concat() performance #31522

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buffer: improve concat() performance #31522

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@mscdex mscdex commented Jan 26, 2020 •
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Benchmark results:

                                                                              confidence improvement accuracy (*)   (**)  (***)
 buffers/buffer-concat-fill.js n=800000 extraSize=1                                 ***     23.65 %       ±1.60% ±2.13% ±2.78%
 buffers/buffer-concat-fill.js n=800000 extraSize=1024                              ***     12.27 %       ±1.06% ±1.41% ±1.84%
 buffers/buffer-concat-fill.js n=800000 extraSize=256                               ***     19.62 %       ±1.42% ±1.89% ±2.46%
 buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=1 pieces=16          ***    112.83 %       ±4.56% ±6.08% ±7.93%
 buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=1 pieces=4           ***     78.89 %       ±2.94% ±3.95% ±5.24%
 buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=16 pieces=16         ***     97.94 %       ±0.62% ±0.82% ±1.08%
 buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=16 pieces=4          ***     79.88 %       ±1.41% ±1.88% ±2.45%
 buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=256 pieces=16        ***     13.59 %       ±1.84% ±2.46% ±3.24%
 buffers/buffer-concat.js n=800000 withTotalLength=0 pieceSize=256 pieces=4         ***     37.14 %       ±1.92% ±2.55% ±3.33%
 buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=1 pieces=16          ***    110.13 %       ±4.85% ±6.46% ±8.42%
 buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=1 pieces=4           ***     70.24 %       ±2.66% ±3.54% ±4.61%
 buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=16 pieces=16         ***     93.56 %       ±3.87% ±5.19% ±6.84%
 buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=16 pieces=4          ***     72.01 %       ±1.72% ±2.29% ±2.98%
 buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=256 pieces=16        ***     11.80 %       ±2.57% ±3.42% ±4.47%
 buffers/buffer-concat.js n=800000 withTotalLength=1 pieceSize=256 pieces=4         ***     36.90 %       ±1.17% ±1.56% ±2.03%
Checklist
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • tests and/or benchmarks are included
  • commit message follows commit guidelines

@mscdex mscdex added buffer Issues and PRs related to the buffer subsystem. performance Issues and PRs related to the performance of Node.js. labels Jan 26, 2020
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CI: https://ci.nodejs.org/job/node-test-pull-request/28686/

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mscdex commented Jan 27, 2020 •
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Also swapped out the .fill() in .concat() for a more direct byte-based fill and included a benchmark for it.

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CI: https://ci.nodejs.org/job/node-test-pull-request/28704/

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CI: https://ci.nodejs.org/job/node-test-pull-request/28731/

@addaleax addaleax added the author ready PRs that have at least one approval, no pending requests for changes, and a CI started. label Jan 28, 2020
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Trott commented Jan 29, 2020

Landed in 2170259

@Trott Trott closed this Jan 29, 2020
Trott pushed a commit that referenced this pull request Jan 29, 2020
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buffer: improve concat() performance
2170259 
PR-URL: #31522
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
@mscdex mscdex deleted the buffer-improve-concat-perf branch January 29, 2020 09:23
codebytere pushed a commit that referenced this pull request Feb 17, 2020
@mscdex @codebytere
buffer: improve concat() performance
769154d 
PR-URL: #31522
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
@codebytere codebytere mentioned this pull request Feb 17, 2020
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codebytere pushed a commit that referenced this pull request Mar 15, 2020
@mscdex @codebytere
buffer: improve concat() performance
fb1ccd8 
PR-URL: #31522
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
codebytere pushed a commit that referenced this pull request Mar 17, 2020
@mscdex @codebytere
buffer: improve concat() performance
6d1c699 
PR-URL: #31522
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
@codebytere codebytere mentioned this pull request Mar 17, 2020
Merged
codebytere pushed a commit that referenced this pull request Mar 30, 2020
@mscdex @codebytere
buffer: improve concat() performance
22a37d6 
PR-URL: #31522
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
@Page- Page- mentioned this pull request Mar 31, 2020
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@jasnell jasnell jasnell approved these changes

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