Bug 217850

Summary: [WinCairo] sluggish page scrolling for wheel events since r268499
Product: WebKit Reporter: Fujii Hironori <Hironori.Fujii>
Component: ScrollingAssignee: Fujii Hironori <Hironori.Fujii>
Status: RESOLVED FIXED    
Severity: Normal CC: simon.fraser, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
Patch none

Fujii Hironori
Reported 2020-10-16 15:20:57 PDT
[WinCairo] sluggish page scrolling even in non-AC mode 1. Start WinCairo MiniBrowser 2. Go to https://trac.webkit.org/wiki 3. scroll down by mouse wheel r267199 (with WebKitRequirements v2020.08.20): smooth scrolling r268564 (with WebKitRequirements v2020.10.04): sluggish scrolling
Attachments
Patch (1.75 KB, patch)
2020-10-18 13:58 PDT, Fujii Hironori 		no flags
DetailsFormatted DiffDiff
View All Add attachment proposed patch, testcase, etc.
Simon Fraser (smfr)
Comment 1 2020-10-16 19:44:59 PDT
Test around r268287, r268417, r268476, r268499.
Fujii Hironori
Comment 2 2020-10-18 13:08:56 PDT
It's a very useful information for bisecting. Thank you. r268498 : smooth scrolling r268499 : sluggish scrolling This issue has been started since r268499.
Fujii Hironori
Comment 3 2020-10-18 13:58:05 PDT
Created attachment 411718 [details] Patch
Fujii Hironori
Comment 4 2020-10-18 13:59:05 PDT
I don't understand this change, but I confirmed this patch fixes the WinCairo issue.
Fujii Hironori
Comment 5 2020-10-18 22:18:43 PDT
Comment on attachment 411718 [details] Patch Clearing flags on attachment: 411718 Committed r268664: <https://trac.webkit.org/changeset/268664>
Fujii Hironori
Comment 6 2020-10-18 22:18:46 PDT
All reviewed patches have been landed. Closing bug.
Radar WebKit Bug Importer
Comment 7 2020-10-18 22:19:18 PDT
<rdar://problem/70427879>
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