util: move validations for text decoder to c++ #45388

anonrig · 2022-11-09T14:20:55Z

This is the 3rd pull request for my text-decoder performance patches. It removes any unnecessary check and moves them to the C++ side. I'll update the description when benchmark CI is complete.

Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1214/

                                                                                                 confidence improvement accuracy (*)    (**)   (***)
util/text-decoder.js type='ArrayBuffer' n=100 len=16384 ignoreBOM=0 encoding='iso-8859-3'                       -7.02 %       ±9.20% ±12.25% ±15.98%
util/text-decoder.js type='ArrayBuffer' n=100 len=16384 ignoreBOM=0 encoding='latin1'                           -8.56 %      ±10.35% ±13.81% ±18.03%
util/text-decoder.js type='ArrayBuffer' n=100 len=16384 ignoreBOM=0 encoding='utf-8'                            -3.94 %       ±7.71% ±10.27% ±13.38%
util/text-decoder.js type='ArrayBuffer' n=100 len=16384 ignoreBOM=1 encoding='iso-8859-3'                        2.52 %       ±9.46% ±12.59% ±16.40%
util/text-decoder.js type='ArrayBuffer' n=100 len=16384 ignoreBOM=1 encoding='latin1'                           -1.23 %       ±9.25% ±12.33% ±16.09%
util/text-decoder.js type='ArrayBuffer' n=100 len=16384 ignoreBOM=1 encoding='utf-8'                            -1.40 %       ±7.54% ±10.04% ±13.07%
util/text-decoder.js type='ArrayBuffer' n=100 len=256 ignoreBOM=0 encoding='iso-8859-3'                 ***     22.19 %      ±11.86% ±15.78% ±20.55%
util/text-decoder.js type='ArrayBuffer' n=100 len=256 ignoreBOM=0 encoding='latin1'                     ***     32.85 %      ±12.41% ±16.53% ±21.54%
util/text-decoder.js type='ArrayBuffer' n=100 len=256 ignoreBOM=0 encoding='utf-8'                       **     14.43 %       ±9.69% ±12.89% ±16.78%
util/text-decoder.js type='ArrayBuffer' n=100 len=256 ignoreBOM=1 encoding='iso-8859-3'                 ***     28.77 %      ±12.55% ±16.70% ±21.73%
util/text-decoder.js type='ArrayBuffer' n=100 len=256 ignoreBOM=1 encoding='latin1'                     ***     28.74 %      ±13.39% ±17.83% ±23.22%
util/text-decoder.js type='ArrayBuffer' n=100 len=256 ignoreBOM=1 encoding='utf-8'                      ***     16.03 %       ±8.30% ±11.05% ±14.42%
util/text-decoder.js type='ArrayBuffer' n=100 len=524288 ignoreBOM=0 encoding='iso-8859-3'                       7.19 %       ±7.88% ±10.48% ±13.64%
util/text-decoder.js type='ArrayBuffer' n=100 len=524288 ignoreBOM=0 encoding='latin1'                          -2.51 %       ±6.77%  ±9.01% ±11.72%
util/text-decoder.js type='ArrayBuffer' n=100 len=524288 ignoreBOM=0 encoding='utf-8'                            0.14 %       ±6.88%  ±9.16% ±11.92%
util/text-decoder.js type='ArrayBuffer' n=100 len=524288 ignoreBOM=1 encoding='iso-8859-3'                      -0.41 %       ±7.27%  ±9.67% ±12.59%
util/text-decoder.js type='ArrayBuffer' n=100 len=524288 ignoreBOM=1 encoding='latin1'                           1.48 %       ±7.13%  ±9.49% ±12.36%
util/text-decoder.js type='ArrayBuffer' n=100 len=524288 ignoreBOM=1 encoding='utf-8'                            0.62 %       ±6.23%  ±8.29% ±10.79%
util/text-decoder.js type='Buffer' n=100 len=16384 ignoreBOM=0 encoding='iso-8859-3'                            -2.13 %      ±11.79% ±15.68% ±20.41%
util/text-decoder.js type='Buffer' n=100 len=16384 ignoreBOM=0 encoding='latin1'                                -3.48 %      ±11.47% ±15.28% ±19.92%
util/text-decoder.js type='Buffer' n=100 len=16384 ignoreBOM=0 encoding='utf-8'                                 -7.71 %      ±13.21% ±17.59% ±22.93%
util/text-decoder.js type='Buffer' n=100 len=16384 ignoreBOM=1 encoding='iso-8859-3'                            -2.91 %      ±11.03% ±14.68% ±19.11%
util/text-decoder.js type='Buffer' n=100 len=16384 ignoreBOM=1 encoding='latin1'                                 1.95 %       ±9.36% ±12.46% ±16.24%
util/text-decoder.js type='Buffer' n=100 len=16384 ignoreBOM=1 encoding='utf-8'                                 -6.77 %      ±12.67% ±16.86% ±21.95%
util/text-decoder.js type='Buffer' n=100 len=256 ignoreBOM=0 encoding='iso-8859-3'                      ***     37.90 %      ±12.51% ±16.66% ±21.72%
util/text-decoder.js type='Buffer' n=100 len=256 ignoreBOM=0 encoding='latin1'                          ***     28.82 %      ±11.43% ±15.23% ±19.87%
util/text-decoder.js type='Buffer' n=100 len=256 ignoreBOM=0 encoding='utf-8'                           ***     24.74 %      ±13.10% ±17.54% ±23.06%
util/text-decoder.js type='Buffer' n=100 len=256 ignoreBOM=1 encoding='iso-8859-3'                      ***     31.08 %      ±11.10% ±14.81% ±19.34%
util/text-decoder.js type='Buffer' n=100 len=256 ignoreBOM=1 encoding='latin1'                          ***     18.27 %       ±9.55% ±12.71% ±16.54%
util/text-decoder.js type='Buffer' n=100 len=256 ignoreBOM=1 encoding='utf-8'                           ***     22.99 %      ±10.36% ±13.79% ±17.97%
util/text-decoder.js type='Buffer' n=100 len=524288 ignoreBOM=0 encoding='iso-8859-3'                           -0.68 %       ±5.90%  ±7.86% ±10.27%
util/text-decoder.js type='Buffer' n=100 len=524288 ignoreBOM=0 encoding='latin1'                                0.15 %       ±6.61%  ±8.79% ±11.44%
util/text-decoder.js type='Buffer' n=100 len=524288 ignoreBOM=0 encoding='utf-8'                                 1.44 %       ±5.09%  ±6.77%  ±8.82%
util/text-decoder.js type='Buffer' n=100 len=524288 ignoreBOM=1 encoding='iso-8859-3'                           -2.64 %       ±6.48%  ±8.62% ±11.23%
util/text-decoder.js type='Buffer' n=100 len=524288 ignoreBOM=1 encoding='latin1'                                3.62 %       ±6.72%  ±8.94% ±11.64%
util/text-decoder.js type='Buffer' n=100 len=524288 ignoreBOM=1 encoding='utf-8'                                 3.34 %       ±5.21%  ±6.93%  ±9.02%
util/text-decoder.js type='SharedArrayBuffer' n=100 len=16384 ignoreBOM=0 encoding='iso-8859-3'                  3.80 %       ±9.18% ±12.21% ±15.89%
util/text-decoder.js type='SharedArrayBuffer' n=100 len=16384 ignoreBOM=0 encoding='latin1'                     -1.58 %      ±10.41% ±13.87% ±18.07%
util/text-decoder.js type='SharedArrayBuffer' n=100 len=16384 ignoreBOM=0 encoding='utf-8'                      -4.04 %       ±9.79% ±13.06% ±17.06%
util/text-decoder.js type='SharedArrayBuffer' n=100 len=16384 ignoreBOM=1 encoding='iso-8859-3'                  5.56 %      ±10.50% ±14.01% ±18.31%
util/text-decoder.js type='SharedArrayBuffer' n=100 len=16384 ignoreBOM=1 encoding='latin1'                      1.38 %       ±9.58% ±12.77% ±16.65%
util/text-decoder.js type='SharedArrayBuffer' n=100 len=16384 ignoreBOM=1 encoding='utf-8'                       0.72 %       ±6.72%  ±8.95% ±11.68%
util/text-decoder.js type='SharedArrayBuffer' n=100 len=256 ignoreBOM=0 encoding='iso-8859-3'           ***     16.70 %       ±9.00% ±11.97% ±15.59%
util/text-decoder.js type='SharedArrayBuffer' n=100 len=256 ignoreBOM=0 encoding='latin1'               ***     22.84 %      ±10.16% ±13.53% ±17.65%
util/text-decoder.js type='SharedArrayBuffer' n=100 len=256 ignoreBOM=0 encoding='utf-8'                 **     17.96 %      ±11.81% ±15.73% ±20.51%
util/text-decoder.js type='SharedArrayBuffer' n=100 len=256 ignoreBOM=1 encoding='iso-8859-3'           ***     33.84 %      ±10.52% ±14.05% ±18.39%
util/text-decoder.js type='SharedArrayBuffer' n=100 len=256 ignoreBOM=1 encoding='latin1'               ***     28.41 %      ±10.75% ±14.34% ±18.73%
util/text-decoder.js type='SharedArrayBuffer' n=100 len=256 ignoreBOM=1 encoding='utf-8'                ***     24.81 %       ±6.80%  ±9.05% ±11.78%
util/text-decoder.js type='SharedArrayBuffer' n=100 len=524288 ignoreBOM=0 encoding='iso-8859-3'                 1.99 %       ±6.46%  ±8.59% ±11.19%
util/text-decoder.js type='SharedArrayBuffer' n=100 len=524288 ignoreBOM=0 encoding='latin1'                     0.89 %       ±6.93%  ±9.23% ±12.02%
util/text-decoder.js type='SharedArrayBuffer' n=100 len=524288 ignoreBOM=0 encoding='utf-8'                     -0.38 %       ±7.79% ±10.36% ±13.49%
util/text-decoder.js type='SharedArrayBuffer' n=100 len=524288 ignoreBOM=1 encoding='iso-8859-3'                 2.89 %       ±6.31%  ±8.40% ±10.94%
util/text-decoder.js type='SharedArrayBuffer' n=100 len=524288 ignoreBOM=1 encoding='latin1'                     4.58 %       ±6.05%  ±8.05% ±10.47%
util/text-decoder.js type='SharedArrayBuffer' n=100 len=524288 ignoreBOM=1 encoding='utf-8'                     -2.54 %       ±7.23%  ±9.63% ±12.55%

Be aware that when doing many comparisons the risk of a false-positive
result increases. In this case, there are 54 comparisons, you can thus
expect the following amount of false-positive results:
  2.70 false positives, when considering a   5% risk acceptance (*, **, ***),
  0.54 false positives, when considering a   1% risk acceptance (**, ***),
  0.05 false positives, when considering a 0.1% risk acceptance (***)

CC @nodejs/performance @nodejs/util

addaleax

Just a heads up, while I personally really like this change and think it’s a good idea, this isn’t really in line with what the project has been doing in the past years in terms of input validation (which is to validate in JS and add CHECKs in C++).

src/node_i18n.cc

nodejs-github-bot · 2022-11-09T15:27:09Z

CI: https://ci.nodejs.org/job/node-test-pull-request/47809/

nodejs-github-bot · 2022-11-09T17:49:49Z

CI: https://ci.nodejs.org/job/node-test-pull-request/47812/

mcollina

lgtm

nodejs-github-bot · 2022-11-09T22:42:55Z

CI: https://ci.nodejs.org/job/node-test-pull-request/47816/

nodejs-github-bot · 2022-11-10T20:50:09Z

CI: https://ci.nodejs.org/job/node-test-pull-request/47846/

nodejs-github-bot · 2022-11-11T13:24:24Z

CI: https://ci.nodejs.org/job/node-test-pull-request/47866/

anonrig · 2022-11-11T14:41:27Z

Landed in d6c10e1

PR-URL: #45388 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com>

PR-URL: nodejs#45388 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com>

Trott · 2022-11-12T01:51:04Z

Re-landed in ca3ed36

PR-URL: #45388 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com>

PR-URL: nodejs#45388 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com>

PR-URL: #45388 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com>

nodejs-github-bot added c++ Issues and PRs that require attention from people who are familiar with C++. encoding Issues and PRs related to the TextEncoder and TextDecoder APIs. i18n-api Issues and PRs related to the i18n implementation. needs-ci PRs that need a full CI run. labels Nov 9, 2022

anonrig added the performance Issues and PRs related to the performance of Node.js. label Nov 9, 2022

anonrig force-pushed the perf/text-decoder-3 branch 2 times, most recently from 0437868 to 1bf201e Compare November 9, 2022 14:41

addaleax approved these changes Nov 9, 2022

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anonrig force-pushed the perf/text-decoder-3 branch from 1bf201e to c74850f Compare November 9, 2022 14:48

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CI Reliability 2022-11-10 nodejs/reliability#424

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util: improve text decoder performance

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PR-URL: #45388 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com>

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util: improve text decoder performance

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PR-URL: #45388 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com>

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v19.2.0 proposal #45615

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[v18.x backport] backport utf8 performance improvements #45650

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PR-URL: #45388 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com>

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v18.13.0 release proposal #46025

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PR-URL: #45388 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com>

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util: improve text decoder performance

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PR-URL: #45388 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com>

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util: move validations for text decoder to c++ #45388

util: move validations for text decoder to c++ #45388

anonrig commented Nov 9, 2022 •

edited

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Trott commented Nov 12, 2022

util: move validations for text decoder to c++ #45388

util: move validations for text decoder to c++ #45388

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edited