If you tell me how to enable paint timing by default, I can start an A/B task 
for you. I’m probably not qualified to review it for code maturity though.

Cheers,
Keith

> On Jul 13, 2020, at 3:02 AM, Noam Rosenthal <n...@webkit.org> wrote:
> 
> 
> 
> On Wed, May 27, 2020 at 12:04 PM Yoav Weiss <y...@yoav.ws 
> <mailto:y...@yoav.ws>> wrote:
> +Ryosuke Niwa <mailto:rn...@webkit.org> +Alex Christensen 
> <mailto:achristen...@apple.com> who were involved in the spec discussions.
> 
> On Wed, May 27, 2020 at 10:29 AM Noam Rosenthal <n...@webkit.org 
> <mailto:n...@webkit.org>> wrote:
> 
> 
> Following up on this.
> FOn Tue, May 12, 2020 at 10:28 AM Maciej Stachowiak <m...@apple.com 
> <mailto:m...@apple.com>> wrote:
> 
> 
>> On May 11, 2020, at 9:53 PM, Noam Rosenthal <n...@webkit.org 
>> <mailto:n...@webkit.org>> wrote:
>> 
>> 
>> 
>> On Tue, May 12, 2020 at 1:36 AM Maciej Stachowiak <m...@apple.com 
>> <mailto:m...@apple.com>> wrote:
>> 
>> 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? 
>> I've tested it locally, I haven't noticed any significant side effect, 
>> because in complex situations the fake paint only happens once per page and 
>> bails early once contentfulness is detected. but I can run any additional 
>> test needed.
>>  
>> We’ll likely want to A/B some of Apple’s page load speed benchmarks.
>> A/B testing load speed sounds sensible. How do we go about doing that?
> 
> Unfortunately our page load speed benchmarks are not public because they 
> incorporate captured page content, which we can’t freely redistribute.
> 
> So, can someone else from Apple review that the code is mature enough for 
> this? Simon had reviewed the original patch. Maybe Zalan/Darin? 
> 
> A helpful person from Apple may be able to set up an A/B test for this patch.
> What's required to ask for help from a helpful person at Apple? :) 
> Hola
> Pinging about this again :)
> The code for paint timing API is sitting there in the repo, waiting either 
> for internal Apple A/B tests, for an additional code maturity review, or for 
> enabling it by default... I'm here if any changes in the code need to be made.
> 
> Trying to figure out how we can proceed with this... @Maciej Stachowiak 
> <mailto:m...@apple.com>?
> Cheers
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