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

[Yoav Weiss]

+Ryosuke Niwa <rniwa at webkit.org> +Alex Christensen <achristensen at apple.com> who
were involved in the spec discussions.

On Wed, May 27, 2020 at 10:29 AM Noam Rosenthal <noam at webkit.org> wrote:

>
>
> Following up on this.
>
>> FOn Tue, May 12, 2020 at 10:28 AM Maciej Stachowiak <mjs at apple.com>
>> wrote:
>>
>>>
>>>
>>> On May 11, 2020, at 9:53 PM, Noam Rosenthal <noam at webkit.org> wrote:
>>>
>>>
>>>
>>> On Tue, May 12, 2020 at 1:36 AM Maciej Stachowiak <mjs at 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? :)
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