Bug 223513

Summary:	chromestatus.com very slow to load
Product:	WebKit	Reporter:	Sam Sneddon [:gsnedders] <gsnedders>
Component:	Layout and Rendering	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	ap, bfulgham, koivisto, simon.fraser, webkit-bug-importer, zalan
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified
URL:	https://www.chromestatus.com/features

Description Sam Sneddon [:gsnedders] 2021-03-19 07:42:02 PDT

Locally, with r274641, we end up with three frames >1s, with 15.69s spent in layout between them. This is massively worse than page load in Chrome or Firefox.

Comment 1 Alexey Proskuryakov 2021-03-22 14:58:09 PDT

I cannot reproduce us being massively slower with a recent macOS beta. It's clearly slower than Chrome, but only by ~1 second until the page is fully rendered.

Comment 2 Radar WebKit Bug Importer 2021-03-26 07:42:13 PDT

<rdar://problem/75885779>

Comment 3 Sam Sneddon [:gsnedders] 2021-03-26 08:47:07 PDT

(In reply to Alexey Proskuryakov from comment #1)
> I cannot reproduce us being massively slower with a recent macOS beta. It's
> clearly slower than Chrome, but only by ~1 second until the page is fully
> rendered.

Caused by a content blocker extension, seemingly. Followed up on Radar until we decide whether it's a WebKit or a Safari issue.