buffer: improve performance caused by primordials #30235

jizusun · 2019-11-03T12:10:24Z

This is my first try, and it's based on the code-and-learn guidances
This restore some performance after introducing primordialias.

Benchmark compared with master version using the methods mentioned here

Perf Comparison

                                                                                confidence improvement accuracy (*)    (**)   (***)
 buffers/buffer-compare-offset.js n=1000000 size=16 method='offset'                            -2.56 %       ±5.19%  ±6.93%  ±9.07%
 buffers/buffer-compare-offset.js n=1000000 size=16 method='slice'                     ***     17.14 %       ±4.95%  ±6.60%  ±8.60%
 buffers/buffer-compare-offset.js n=1000000 size=16386 method='offset'                         -1.76 %       ±4.77%  ±6.35%  ±8.26%
 buffers/buffer-compare-offset.js n=1000000 size=16386 method='slice'                  ***     21.40 %       ±6.61%  ±8.81% ±11.50%
 buffers/buffer-compare-offset.js n=1000000 size=4096 method='offset'                           1.69 %       ±5.34%  ±7.12%  ±9.28%
 buffers/buffer-compare-offset.js n=1000000 size=4096 method='slice'                   ***     20.82 %       ±5.64%  ±7.52%  ±9.84%
 buffers/buffer-compare-offset.js n=1000000 size=512 method='offset'                           -1.59 %       ±5.90%  ±7.86% ±10.26%
 buffers/buffer-compare-offset.js n=1000000 size=512 method='slice'                    ***     20.01 %       ±4.67%  ±6.22%  ±8.10%

Refs: #29766
Refs: nodejs/code-and-learn#97
Refs: #29633

Checklist

make -j4 test (UNIX), or vcbuild test (Windows) passes
commit message follows commit guidelines

This is my first PR, and it's based on the code-and-learn guidances This restore some performance after introducing primordialias. Fixes: nodejs#29766 Refs: nodejs/code-and-learn#97 Refs: nodejs#29633

addaleax · 2019-11-03T12:18:51Z

lib/buffer.js

@@ -21,7 +21,8 @@

 'use strict';

-const { Math, Object } = primordials;
+const { Object: { defineProperties, defineProperty, setPrototypeOf, create } } = primordials;


Did you run make lint? It would usually complain about a line longer than 80 characters.

Good afternoon 😃
Oh what a quick feedback!
Thank you♥️
I'll fix it when I'm back home.

One more thing to ask for help, what's the correct way to do prettify? Normally I have prettier set up with eslint, but I didn't find similar in the Makefile.

make lint-js-fix :)

Oh I mean, for the max-len rule, the eslint --fix cannot help.
So I have to correct it by myself, right?

jizusun · 2019-11-03T13:14:52Z

I think I also need to include a benchmark section to make my first PR better 😏 , but I don't have time today.
I'll dive deep into it tomorrow.

benchmark attached

lib/buffer.js

legendecas

LGTM % one nit in comments.

lib/buffer.js

nodejs-github-bot · 2019-11-04T04:37:41Z

CI: https://ci.nodejs.org/job/node-test-pull-request/26304/

jizusun · 2019-11-04T07:11:57Z

Dear all reviewers,

I saw the several builds fails in Jenkins, and one build node-test-commit-freefsd fails because

FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory

Do you think it's because of my change or the job is not stable (ignore it / re-trigger it)?

nodejs-github-bot · 2019-11-04T07:36:27Z

CI: https://ci.nodejs.org/job/node-test-pull-request/26310/

gireeshpunathil · 2019-11-04T07:51:56Z

@jizusun - we have seen that earlier and reported in #29802 , so don't worry about that.

This is my first PR, and it's based on the code-and-learn guidances This restore some performance after introducing primordialias. Refs: #29766 Refs: nodejs/code-and-learn#97 Refs: #29633 PR-URL: #30235 Refs: #29766 Reviewed-By: Gireesh Punathil <[email protected]> Reviewed-By: Chengzhong Wu <[email protected]> Reviewed-By: David Carlier <[email protected]> Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Yongsheng Zhang <[email protected]> Reviewed-By: Trivikram Kamat <[email protected]>

ZYSzys · 2019-11-04T13:28:11Z

Landed in 22799be.

Thanks for the contribution! 🎉

(If you're interested in other possible contributions to Node.js but don't have a good idea of where to start looking, some ideas are posted at https://www.nodetodo.org/next-steps/.)

This is my first PR, and it's based on the code-and-learn guidances This restore some performance after introducing primordialias. Refs: #29766 Refs: nodejs/code-and-learn#97 Refs: #29633 PR-URL: #30235 Refs: #29766 Reviewed-By: Gireesh Punathil <[email protected]> Reviewed-By: Chengzhong Wu <[email protected]> Reviewed-By: David Carlier <[email protected]> Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Yongsheng Zhang <[email protected]> Reviewed-By: Trivikram Kamat <[email protected]>

buffer: improve performance caused by primordials

3a7c798

This is my first PR, and it's based on the code-and-learn guidances This restore some performance after introducing primordialias. Fixes: nodejs#29766 Refs: nodejs/code-and-learn#97 Refs: nodejs#29633

nodejs-github-bot added the buffer Issues and PRs related to the buffer subsystem. label Nov 3, 2019

jizusun mentioned this pull request Nov 3, 2019

event: improve performance of EventEmitter.emit #29633

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addaleax reviewed Nov 3, 2019

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buffer: fix lint error

0a1d464

jizusun force-pushed the code-learn-20191103 branch from 61292fa to 0a1d464 Compare November 3, 2019 12:58

jizusun mentioned this pull request Nov 3, 2019

Performance regression in v12 caused by primordials #29766

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gireeshpunathil added the code-and-learn Issues related to the Code-and-Learn events and PRs submitted during the events. label Nov 3, 2019

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chore: more explicit names

d04e6d8

jizusun force-pushed the code-learn-20191103 branch from ba61692 to d04e6d8 Compare November 4, 2019 03:50

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targos mentioned this pull request Nov 5, 2019

v13.1.0 release proposal #30262

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v12.13.1 release proposal #30352

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