Bug 175871

Summary: Speedometer 2.0: Async time is not always capturing layout time
Product: WebKit Reporter: Ryosuke Niwa <rniwa>
Component: Tools / TestsAssignee: Ryosuke Niwa <rniwa>
Status: RESOLVED FIXED    
Severity: Normal CC: addyo, cdumez, fpizlo, ggaren, jonlee, kling, koivisto, lforschler, mathias, saam, simon.fraser, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Bug Depends on:    
Bug Blocks: 172339    
Attachments:
Description Flags
Improves the harness none

Ryosuke Niwa
Reported 2017-08-22 20:33:02 PDT
In some browsers, layout & paint happens in accordance with vsync / rAF. This means that async time doesn't always capture the time to update the layout. Work around this limitation by manually forcing the layout in async time measurement.
Attachments
Improves the harness (3.32 KB, patch)
2017-08-22 21:16 PDT, Ryosuke Niwa 		no flags
DetailsFormatted DiffDiff
View All Add attachment proposed patch, testcase, etc.
Ryosuke Niwa
Comment 1 2017-08-22 21:16:17 PDT
Created attachment 318851 [details] Improves the harness
Ryosuke Niwa
Comment 2 2017-08-22 21:59:51 PDT
There's no measurable difference in the total score. ==Before== Safari 117.0 118.3 115.7 Chrome 113.7 112.3 113.2 Firefox 79.91 78.17 79.60 ==After== Safari 116.7 117.9 118.4 Chrome 112.7 112.4 113.4 Firefox 79.39 79.68 79.10
Ryosuke Niwa
Comment 3 2017-08-23 14:40:43 PDT
Comment on attachment 318851 [details] Improves the harness Clearing flags on attachment: 318851 Committed r221106: <http://trac.webkit.org/changeset/221106>
Ryosuke Niwa
Comment 4 2017-08-23 14:40:45 PDT
All reviewed patches have been landed. Closing bug.
Radar WebKit Bug Importer
Comment 5 2017-08-23 14:43:57 PDT
<rdar://problem/34044521>
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