Bug 238374

Summary: Reduce EventListenerVector's minimum capacity from 16 to 2
Product: WebKit Reporter: Chris Dumez <cdumez>
Component: WebCore Misc.Assignee: Chris Dumez <cdumez>
Status: RESOLVED FIXED    
Severity: Normal CC: esprehn+autocc, ews-watchlist, ggaren, kangil.han, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
Patch none

Chris Dumez
Reported 2022-03-25 07:43:12 PDT
Reduce EventListenerVector's minimum capacity from 16 to 2 to save memory and get a small speedup on Speedometer. Very few event listeners are registered for a given type in the common case so eagerly allocating enough memory for 16 is wasteful. This is a confirmed 0.4% progression on Speedometer according to A/B bots.
Attachments
Patch (1.47 KB, patch)
2022-03-25 07:44 PDT, Chris Dumez 		no flags
DetailsFormatted DiffDiff
View All Add attachment proposed patch, testcase, etc.
Chris Dumez
Comment 1 2022-03-25 07:44:10 PDT
Created attachment 455760 [details] Patch
Geoffrey Garen
Comment 2 2022-03-25 09:54:09 PDT
Comment on attachment 455760 [details] Patch r=me
EWS
Comment 3 2022-03-25 10:40:17 PDT
Committed r291866 (248872@main): <https://commits.webkit.org/248872@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 455760 [details].
Radar WebKit Bug Importer
Comment 4 2022-03-25 10:41:18 PDT
<rdar://problem/90845294>
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