Intent to Implement: User Timing API

[Kyle Machulis]

Summary: We've already got the performance resource timing API implemented (https://bugzilla.mozilla.org/show_bug.cgi?id=822480), but never got around to implementing the user timing API. This would allow users to set unique marks for profiling events in their own code, and most of the objects already exist, we just need to expose/store them in the right way. There's some performance tools being developed for FxOS that polyfill this API, but it'd be nice to just have it done.

Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=782751

Link to Standard: http://www.w3.org/TR/user-timing/

Platform Coverage: all

Estimated or Target Release: Firefox 38

Preference behind which this will be implemented: dom.enable_performance

[Jonas Sicking]

Yes!

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[Kyle Machulis]

Small correction, the preference should be dom.enable_user_timing, not dom.enable_performance

----- Original Message -----

[Kan-Ru Chen]

Yes! The marks could be used by SPS or Tasktracer!

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[Ehsan Akhgari]

Nice!

Eli was looking into this recently as well, not sure if you guys have
talked about this, if not, you should. :-)

[Kyle Machulis]

Yup, this is all Eli's fault. :)

----- Original Message -----

> From: "Ehsan Akhgari" <ehsan....@gmail.com>
> To: "Kyle Machulis" <kmac...@mozilla.com>, dev-pl...@lists.mozilla.org,
> dev-w...@lists.mozilla.org, "Eli Perelman" <eper...@mozilla.com>
> Sent: Thursday, December 11, 2014 5:57:44 PM
> Subject: Re: Intent to Implement: User Timing API

[Ilya Grigorik]

\o/

On Thu, Dec 11, 2014 at 5:15 PM, Jonas Sicking <jo...@sicking.cc> wrote:

> Yes!
>
> On Thu, Dec 11, 2014 at 5:11 PM, Kyle Machulis <kmac...@mozilla.com>