Bug 208270

Summary:	Overflow scrolling should not require event region rebuilding
Product:	WebKit	Reporter:	Simon Fraser (smfr) <simon.fraser>
Component:	Scrolling	Assignee:	Simon Fraser (smfr) <simon.fraser>
Status:	RESOLVED INVALID
Severity:	Normal	CC:	koivisto, simon.fraser, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	Safari Technology Preview
Hardware:	Unspecified
OS:	Unspecified

Description Simon Fraser (smfr) 2020-02-26 15:40:31 PST

We should avoid rebuilding event regions on overflow scrolling. It's expensive and should not be necessary.

Comment 1 Radar WebKit Bug Importer 2020-02-26 15:40:53 PST

<rdar://problem/59824741>

Comment 2 Simon Fraser (smfr) 2020-06-26 16:35:34 PDT

I confirmed that we don't invalidate event regions on scrolling.