Bug 223513 - chromestatus.com very slow to load
Summary: chromestatus.com very slow to load
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: Layout and Rendering (show other bugs)
Version: WebKit Nightly Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL: https://www.chromestatus.com/features
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2021-03-19 07:42 PDT by Sam Sneddon [:gsnedders]
Modified: 2021-03-26 08:47 PDT (History)
6 users (show)

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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.