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@webkit.org> wrote:

Following the discussion with Simon in https://bugs.webkit.org/show_bug.cgi?id=78011

Since we have a pretty stable spec (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. 

Any objections? Other thoughts?
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