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Issue 825110 link

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Issue metadata

Status: WontFix
Owner:
Closed: Mar 2018
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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5.4% regression in rasterize_and_record_micro.top_25 at 544614:544647

Project Member Reported by chiniforooshan@chromium.org, Mar 23 2018

Issue description

See the link to graphs below.
 
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Mar 23 2018

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=825110

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=0d0e68d285083cbc54a607e1e5eb052d5da459927ae28f6fb9985e10d8c9875c


Bot(s) for this bug's original alert(s):

chromium-rel-win8-dual
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Mar 23 2018

Cc: khushals...@chromium.org enne@chromium.org
Owner: khushals...@chromium.org
Status: Assigned (was: Untriaged)
📍 Found a significant difference after 1 commit.
https://pinpoint-dot-chromeperf.appspot.com/job/12f2452d440000

cc: Support animated images in PaintFilters. by khushalsagar@chromium.org
https://chromium.googlesource.com/chromium/src/+/0c568dc759c39d7598cfd811f7f2096daebc26c0

Understanding performance regressions:
  http://g.co/ChromePerformanceRegressions
Components: Internals>Compositing
Status: WontFix (was: Assigned)
There are multiple changes to discardable image analysis, which is included in record_time, that went into that change. We include non-draw ops during the analysis, and also track HasDiscardableImages state for them correctly. Excluding both these changes locally and testing on Android Nexus5, I was able to recover the regression. But these things are necessary to support the use-case addressed in that patch. Also the regression is minor (~0.05ms in my local test).

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