Bug 243189

Summary:	Evict unused fonts after 4 rendering updates containing paint changes.
Product:	WebKit	Reporter:	Matt Woodrow <mattwoodrow>
Component:	Layout and Rendering	Assignee:	Matt Woodrow <mattwoodrow>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	bfulgham, simon.fraser, webkit-bug-importer, zalan
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Matt Woodrow 2022-07-25 18:36:28 PDT

<rdar://97346409>


We previously evicted fonts from the resource cache if they hadn't been used
for 4 rendering updates. Many rendering updates don't contain any paint changes,
so always count all fonts as 'unused'.

This changes us to only count rendering updates that contain painting towards
deciding if a font has been unused long enough to be evicted.

Comment 1 Matt Woodrow 2022-07-25 18:37:12 PDT

Pull request: https://github.com/WebKit/WebKit/pull/2723

Comment 2 EWS 2022-07-26 14:45:56 PDT

Committed 252844@main (2da5f7dd5dd8): <https://commits.webkit.org/252844@main>

Reviewed commits have been landed. Closing PR #2723 and removing active labels.