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util: avoid out-of-bounds arguments index access #10569

Merged
merged 1 commit into from
Jan 5, 2017
Merged

util: avoid out-of-bounds arguments index access #10569

merged 1 commit into from
Jan 5, 2017

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not-an-aardvark
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@not-an-aardvark not-an-aardvark commented Jan 2, 2017 •
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This updates util.inspect() to avoid accessing out-of-range indices of the arguments object, which is known to cause optimization bailout.

Based on an average of 10 runs of the benchmark in benchmark/util/inspect.js, this change improves the performance of util.inspect by about 10%.

Relates to #10323

Checklist
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • tests and/or benchmarks are included
  • commit message follows commit guidelines
Affected core subsystem(s)

util

@nodejs-github-bot nodejs-github-bot added util Issues and PRs related to the built-in util module. lts-watch-v6.x labels Jan 2, 2017
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not-an-aardvark commented Jan 2, 2017 •
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CI: https://ci.nodejs.org/job/node-test-pull-request/5656/

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Benchmark results:

Without this change:

$ for ((i=0;i<10;i+=1)); do ./node benchmark/util/inspect.js; done
util/inspect.js n=5000000: 59,923
util/inspect.js n=5000000: 68,489
util/inspect.js n=5000000: 66,138
util/inspect.js n=5000000: 68,259
util/inspect.js n=5000000: 66,395
util/inspect.js n=5000000: 64,827
util/inspect.js n=5000000: 69,548
util/inspect.js n=5000000: 73,541
util/inspect.js n=5000000: 66,892
util/inspect.js n=5000000: 65,717

With this change:

$ for ((i=0;i<10;i+=1)); do ./node benchmark/util/inspect.js; done
util/inspect.js n=5000000: 73,957
util/inspect.js n=5000000: 74,728
util/inspect.js n=5000000: 73,496
util/inspect.js n=5000000: 73,604
util/inspect.js n=5000000: 74,919
util/inspect.js n=5000000: 66,369
util/inspect.js n=5000000: 78,040
util/inspect.js n=5000000: 70,583
util/inspect.js n=5000000: 72,164
util/inspect.js n=5000000: 71,974

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Accidentally pushed an older commit that didn't contain local changes, so CI failed. Re-pushed, new CI: https://ci.nodejs.org/job/node-test-pull-request/5657/

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mscdex commented Jan 2, 2017

LGTM

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@JacksonTian
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LGTM

@mscdex mscdex added the performance Issues and PRs related to the performance of Node.js. label Jan 3, 2017
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jasnell commented Jan 4, 2017

Previous CI run had some red... running again just to be safe: https://ci.nodejs.org/job/node-test-pull-request/5701/

@not-an-aardvark
util: avoid out-of-bounds arguments index access
26f2a6e 
This updates util.inspect() to avoid accessing out-of-range indices of
the `arguments` object, which is known to cause optimization bailout.

Based on an average of 10 runs of the benchmark in
`benchmark/util/inspect.js`, this change improves the performance of
`util.inspect` by about 10%.

Relates to nodejs#10323

PR-URL: nodejs#10569
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Jackson Tian <shyvo1987@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
@not-an-aardvark not-an-aardvark merged commit 26f2a6e into nodejs:master Jan 5, 2017
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Landed in 26f2a6e

@not-an-aardvark not-an-aardvark deleted the util-inspect-arguments branch January 5, 2017 06:54
italoacasas pushed a commit to italoacasas/node that referenced this pull request Jan 18, 2017
@not-an-aardvark @italoacasas
util: avoid out-of-bounds arguments index access
46ca669 
This updates util.inspect() to avoid accessing out-of-range indices of
the `arguments` object, which is known to cause optimization bailout.

Based on an average of 10 runs of the benchmark in
`benchmark/util/inspect.js`, this change improves the performance of
`util.inspect` by about 10%.

Relates to nodejs#10323

PR-URL: nodejs#10569
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Jackson Tian <shyvo1987@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
italoacasas pushed a commit to italoacasas/node that referenced this pull request Jan 19, 2017
@not-an-aardvark @italoacasas
util: avoid out-of-bounds arguments index access
74740b2 
This updates util.inspect() to avoid accessing out-of-range indices of
the `arguments` object, which is known to cause optimization bailout.

Based on an average of 10 runs of the benchmark in
`benchmark/util/inspect.js`, this change improves the performance of
`util.inspect` by about 10%.

Relates to nodejs#10323

PR-URL: nodejs#10569
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Jackson Tian <shyvo1987@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
italoacasas pushed a commit to italoacasas/node that referenced this pull request Jan 24, 2017
@not-an-aardvark @italoacasas
util: avoid out-of-bounds arguments index access
4e52ebd 
This updates util.inspect() to avoid accessing out-of-range indices of
the `arguments` object, which is known to cause optimization bailout.

Based on an average of 10 runs of the benchmark in
`benchmark/util/inspect.js`, this change improves the performance of
`util.inspect` by about 10%.

Relates to nodejs#10323

PR-URL: nodejs#10569
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Jackson Tian <shyvo1987@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
@italoacasas italoacasas mentioned this pull request Jan 25, 2017
Closed
italoacasas pushed a commit to italoacasas/node that referenced this pull request Jan 27, 2017
@not-an-aardvark @italoacasas
util: avoid out-of-bounds arguments index access
d628f3a 
This updates util.inspect() to avoid accessing out-of-range indices of
the `arguments` object, which is known to cause optimization bailout.

Based on an average of 10 runs of the benchmark in
`benchmark/util/inspect.js`, this change improves the performance of
`util.inspect` by about 10%.

Relates to nodejs#10323

PR-URL: nodejs#10569
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Jackson Tian <shyvo1987@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
@italoacasas italoacasas mentioned this pull request Jan 29, 2017
Merged
@vsemozhetbyt vsemozhetbyt mentioned this pull request Feb 2, 2017
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@MylesBorins
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should this be backported?

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@jasnell jasnell jasnell approved these changes

@evanlucas evanlucas evanlucas approved these changes

@Fishrock123 Fishrock123 Fishrock123 approved these changes

@cjihrig cjihrig cjihrig approved these changes

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@not-an-aardvark @mscdex @JacksonTian @jasnell @MylesBorins @evanlucas @Fishrock123 @cjihrig @nodejs-github-bot