[webkit-dev] Suggesting to enable paint timing by default

Maciej Stachowiak mjs at apple.com
Mon May 11 15:35:58 PDT 2020

I noticed from comments in one of the Radars that the patch may result in an additional “fake paint”, so it should probably be performance tested. Have you done any testing? We’ll likely want to A/B some of Apple’s page load speed benchmarks.

I’d like to hear from others on maturity of the spec and readiness of the code.

 - Maciej

> On May 11, 2020, at 11:44 AM, Noam Rosenthal <noam at webkit.org> wrote:
> Following the discussion with Simon in https://bugs.webkit.org/show_bug.cgi?id=78011 <https://bugs.webkit.org/show_bug.cgi?id=78011>
> Since we have a pretty stable spec (https://w3c.github.io/paint-timing/ <https://w3c.github.io/paint-timing/>), lots of passing web platform tests, other browser vendor support and a working implementation of first contentful paint, I am planning to submit a patch to enable paint timing by default. 
> https://bugs.webkit.org/show_bug.cgi?id=211736 <https://bugs.webkit.org/show_bug.cgi?id=211736>
> Any objections? Other thoughts?
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