Bug 313941

Summary: Reduce use of uncheckedDowncast for JS types in WebCore/
Product: WebKit Reporter: Chris Dumez <cdumez>
Component: BindingsAssignee: Chris Dumez <cdumez>
Status: RESOLVED FIXED    
Severity: Normal CC: cdumez, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   

Chris Dumez
Reported 2026-05-03 17:24:11 PDT
Reduce use of uncheckedDowncast for JS types in WebCore/. Use safer downcast & dynamicDowncast instead. This tested as performance neutral on Speedometer 3.
Attachments
Chris Dumez
Comment 1 2026-05-03 17:33:40 PDT
EWS
Comment 2 2026-05-03 23:12:27 PDT
Committed 312505@main (952b3b16274d): <https://commits.webkit.org/312505@main> Reviewed commits have been landed. Closing PR #64136 and removing active labels.
Radar WebKit Bug Importer
Comment 3 2026-05-03 23:13:13 PDT
EWS
Comment 4 2026-05-06 02:57:46 PDT
Committed 305413.838@safari-7624-branch (bce21b2cf3d3): <https://commits.webkit.org/305413.838@safari-7624-branch> Reviewed commits have been landed. Closing PR #5177 and removing active labels.
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