Bug 254979

Summary:	REGRESSION: YouTube video stutters while building WebKit
Product:	WebKit	Reporter:	Ryosuke Niwa <rniwa>
Component:	Media	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	ap, cdumez, miguel_salinas, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Ryosuke Niwa 2023-04-04 01:08:02 PDT

With STP167, playing YouTube video while building WebKit in parallel results in the video stutters intermittently.

Reproduction steps:
1. Play YouTube video
2. Start full WebKit build

Expected result:
Video plays smoothly

Actual result:
Video stutters

Comment 1 Ryosuke Niwa 2023-04-04 01:09:56 PDT

Music app can play music fine so this isn't a system recession. Safari 16.2 can play the video while building WebKit just fine on the same system as well.

Comment 2 Radar WebKit Bug Importer 2023-04-11 01:08:16 PDT

<rdar://problem/107872229>