Bug 223471

Summary: Avoid copying item data when iterating in-process display lists
Product: WebKit Reporter: Wenson Hsieh <wenson_hsieh>
Component: WebCore Misc.Assignee: Wenson Hsieh <wenson_hsieh>
Status: RESOLVED FIXED    
Severity: Normal CC: sabouhallawa, simon.fraser, thorton, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
Patch none

Wenson Hsieh
Reported 2021-03-18 12:46:11 PDT
This copy is unnecessary (and potentially expensive) in the case of in-process display lists (e.g. the display lists used to cache glyph data when painting text at high frequency). Impacts the Design subtest of MotionMark.
Attachments
Patch (11.70 KB, patch)
2021-03-18 13:03 PDT, Wenson Hsieh 		no flags
DetailsFormatted DiffDiff
View All Add attachment proposed patch, testcase, etc.
Wenson Hsieh
Comment 1 2021-03-18 13:03:56 PDT
Created attachment 423639 [details] Patch
Wenson Hsieh
Comment 2 2021-03-18 13:35:21 PDT
(After a few quick tests, this seems to give us around +5% on Design)
EWS
Comment 3 2021-03-18 16:43:00 PDT
Committed r274688: <https://commits.webkit.org/r274688> All reviewed patches have been landed. Closing bug and clearing flags on attachment 423639 [details].
Radar WebKit Bug Importer
Comment 4 2021-03-18 16:43:16 PDT
<rdar://problem/75597154>
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