1950508 - Ship Error.captureStackTrace

Status: RESOLVED FIXED

(Core :: JavaScript Engine, task)

Description

[Matthew Gaudet (he/him) [:mgaudet]]

We'll ship this while resolving standardization in parallel

https://github.com/mgaudet/proposal-error-capturestacktrace/blob/main/README.md

Comment 1

[Matthew Gaudet (he/him) [:mgaudet]]

Attachment: Bug 1950508 - Ship Error.captureStackTrace r?dminor!,mccr8!

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/5fdd7a5d986d
Ship Error.captureStackTrace r=dminor,mccr8

Comment 3

[Cristian Tuns]

https://hg.mozilla.org/mozilla-central/rev/5fdd7a5d986d

Comment 4

[Matthew Gaudet (he/him) [:mgaudet]]

Release Note Request (optional, but appreciated)
[Why is this notable]: Fixes web compat problem
[Affects Firefox for Android]: yes
[Suggested wording]: "Shipped an implementation of Error.captureStackTrace to avoid incompatibility with other browsers. We're also pushing on standardization of this non-standard feature"
[Links (documentation, blog post, etc)]: github.com/tc39/proposal-error-capturestacktrace

Comment 5

[Mayank Bansal]

This lead to an improvement of 4KB on Base content JS opt fission on Windows. No idea why, but i did 5 retriggers and got consistent results.

Comment 6

[Dianna Smith [:diannaS]]

Added to the 138 nightly release notes and on track to be in the final release notes.

Comment 7

[Florin Bilt]

(In reply to Cristian Tuns from comment #3)

https://hg.mozilla.org/mozilla-central/rev/5fdd7a5d986d

Perfherder has detected a awsy performance change from push 5fdd7a5d986dbf8742e762f09d8ae7475aea0455.

Improvements:

Ratio	Test	Platform	Options	Absolute values (old vs new)
0.27%	Base Content JS	macosx1470-64-shippable	fission	1,539,680.00 -> 1,535,584.00
0.27%	Base Content JS	windows11-64-24h2-shippable	fission	1,540,640.00 -> 1,536,544.00
0.26%	Base Content JS	windows11-64-24h2-shippable	fission	1,540,946.00 -> 1,536,885.33

Details of the alert can be found in the alert summary, including links to graphs and comparisons for each of the affected tests.

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You can run these tests on try with ./mach try perf --alert 44202

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