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List: webkit-dev
Subject: Re: [webkit-dev] Suggesting to enable paint timing by default
From: Noam Rosenthal <noam () webkit ! org>
Date: 2020-05-12 8:00:17
Message-ID: CAGttnEUn=iW8LiteXc4xXu3OietJY71dFavX0H5eK=jXL+e2gw () mail ! gmail ! com
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On Tue, May 12, 2020 at 10:28 AM Maciej Stachowiak <mjs@apple.com> wrote:
>
>
> On May 11, 2020, at 9:53 PM, Noam Rosenthal <noam@webkit.org> wrote:
>
>
>
> On Tue, May 12, 2020 at 1:36 AM Maciej Stachowiak <mjs@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.
>
> A helpful person from Apple may be able to set up an A/B test for this
> patch.
>
Understood. I'd be happy to facilitate/support/do what's necessary to move
this forward.
Thanks!
[Attachment #5 (text/html)]
<div dir="ltr"><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, May \
12, 2020 at 10:28 AM Maciej Stachowiak <<a \
href="mailto:mjs@apple.com">mjs@apple.com</a>> wrote:<br></div><blockquote \
class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid \
rgb(204,204,204);padding-left:1ex"><div style="overflow-wrap: \
break-word;"><br><div><br><blockquote type="cite"><div>On May 11, 2020, at 9:53 PM, \
Noam Rosenthal <<a href="mailto:noam@webkit.org" \
target="_blank">noam@webkit.org</a>> wrote:</div><br><div><div dir="ltr"><div \
dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On \
Tue, May 12, 2020 at 1:36 AM Maciej Stachowiak <<a href="mailto:mjs@apple.com" \
target="_blank">mjs@apple.com</a>> wrote:<br></div><blockquote class="gmail_quote" \
style="margin:0px 0px 0px 0.8ex;border-left:1px solid \
rgb(204,204,204);padding-left:1ex"><div><div><br></div>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? \
</div></blockquote><div>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.<br> </div><blockquote class="gmail_quote" style="margin:0px \
0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div>We'll \
likely want to A/B some of Apple's page load speed \
benchmarks.</div></blockquote><div>A/B testing load speed sounds sensible. How do we \
go about doing that?<br></div></div></div></div></blockquote><br></div><div>Unfortunately \
our page load speed benchmarks are not public because they incorporate captured page \
content, which we can't freely redistribute.</div><div><br></div><div>A helpful \
person from Apple may be able to set up an A/B test for this \
patch.</div></div></blockquote><div> Understood. I'd be happy to \
facilitate/support/do what's necessary to move this \
forward.<br>Thanks!</div></div></div>
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