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10.6% regression in blink_perf.paint at 532077:532144

Project Member Reported by primiano@chromium.org, Jan 29 2018 
See the link to graphs below.
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Jan 29 2018 

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=806849

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=71ed1af42725de0ffb493f6b653a7dc71b01365c5e3f77de3656347abd949d40


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

chromium-rel-win7-x64-dual
Project Member

Comment 2 by 42576172...@developer.gserviceaccount.com, Jan 29 2018 

馃搷 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/15a9c732840000
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Jan 31 2018

Cc: sadrul@chromium.org r...@opera.com xhw...@chromium.org dcheng@chromium.org chcunningham@chromium.org thakis@chromium.org xiaoche...@chromium.org ryansturm@chromium.org dgozman@chromium.org chfremer@chromium.org chrishtr@chromium.org mojahsu@chromium.org tkent@chromium.org yosin@chromium.org piman@chromium.org danakj@chromium.org emir...@chromium.org zmo@chromium.org peria@chromium.org wfh@chromium.org yoichio@chromium.org kbr@chromium.org trchen@chromium.org hbos@chromium.org futhark@chromium.org kinuko@chromium.org hta@chromium.org haraken@chromium.org yukishiino@chromium.org rjkroege@chromium.org kenrb@chromium.org guidou@chromium.org liber...@chromium.org falken@chromium.org mcasas@chromium.org palmer@chromium.org bashi@chromium.org pfeldman@chromium.org tbansal@chromium.org
Owner: thakis@chromium.org
Status: Assigned (was: Untriaged)
馃搷 Found significant differences after each of 17 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/15a9c732840000

Disable client hints on insecure contexts.
By tbansal@chromium.org 路 Fri Jan 26 22:45:18 2018
chromium @ 8fd1644701f233451848466b4f6cc2d23900a6af

bindigns: Make InstallRuntimeEnabledFeatures as API
By peria@chromium.org 路 Fri Jan 26 22:45:22 2018
chromium @ 32ce3342a390e2e9e3268ea082896e76589f5ded

Enable the Oilpan metadata canary in production builds.
By palmer@chromium.org 路 Fri Jan 26 23:13:26 2018
chromium @ 129fac28f2fc2e9003222a0be60997f299841a9a

Reland "LayoutView::StyleWillChange viewport invalidation"
By trchen@chromium.org 路 Fri Jan 26 23:20:42 2018
chromium @ 1937401660f05dc109a53deb96b10b2735d69656

[ozone/drm] Modify GpuProcessHost to use ozone/drm/mojo
By rjkroege@chromium.org 路 Fri Jan 26 23:33:07 2018
chromium @ 2460e71463578a452799e945b0e96c4f3cfdadcf

Documentation: Fix shared worker comments for RenderProcessHost's KeepAliveRefCount
By falken@chromium.org 路 Sat Jan 27 00:09:31 2018
chromium @ b29e2321bf54561212746abd81963e6a0c900d5e

[LayoutNG] Refactor is_text_direction_rtl computation.
By yoichio@chromium.org 路 Sat Jan 27 00:19:19 2018
chromium @ 06b09b44a0b030afe008f751e0dcb41e4ef1e2b0

[LayoutNG] Refactor RenderedPosition::IsVisible not to use boolean argument.
By yoichio@chromium.org 路 Sat Jan 27 00:19:43 2018
chromium @ 47aba8bb1ceac8d39b93fb0ed6c53d129afc1b8d

GpuMemoryBufferVideoFramePool: add upload TRACE
By mcasas@chromium.org 路 Sat Jan 27 00:46:13 2018
chromium @ 3918768c5c32cf5d8aa35858859cc73b5004b809

Work on getting things built with -Wimplicit-fallthrough. This CL was uploaded by git cl split.
By thakis@chromium.org 路 Sat Jan 27 01:11:49 2018
chromium @ 8d6ecaff82d41bae8b9168c1e954ef1d95b006d9

Use heuristic to group ID for video-input devices in enumerateDevices
By guidou@chromium.org 路 Sat Jan 27 01:39:40 2018
chromium @ 848ce57fc3f3f3b6b099db6f1df81b423a17d945

DevTools: render OOPIF dom trees inline, behind experiment.
By pfeldman@chromium.org 路 Sat Jan 27 01:57:50 2018
chromium @ ee32d835ded06b736f888d6179b03b38a1ed507d

Add JDA Mojo interface to camera dispatcher
By mojahsu@chromium.org 路 Sat Jan 27 02:00:08 2018
chromium @ 9725622913b418cdeeb8bd79e0cd2b3b54bcb82a

Remove MergeGPUInfo() and IsCompleteGPUInfoAvailable().
By zmo@chromium.org 路 Sat Jan 27 02:44:13 2018
chromium @ c4f79c349be6b7ce067b1746fa5a90566f87aa16

Make a separated header file for blink::CreateElementFlags
By tkent@chromium.org 路 Sat Jan 27 02:44:37 2018
chromium @ a187c5b1c5c5280ddb006c228e45e25683860427

DevTools: introduce Page.navigate(frameId).
By pfeldman@chromium.org 路 Sat Jan 27 02:56:32 2018
chromium @ 029bd2f8fe39b021e6bbba942622bccb0fc9fa02

Work on getting things built with -Wimplicit-fallthrough. This CL was uploaded by git cl split.
By thakis@chromium.org 路 Sat Jan 27 03:14:07 2018
chromium @ 638337f75d4c18fd859abf840d41aa41299608ca

Understanding performance regressions:
  http://g.co/ChromePerformanceRegressions

Comment 4 by thakis@chromium.org, Jan 31 2018

Owner: ----
My changes just remove overcounting of umas, I can't imagine that they affect perf in any way.

Comment 5 by falken@chromium.org, Jan 31 2018

Cc: -falken@chromium.org

Comment 6 by rjkroege@chromium.org, Jan 31 2018 

My changes affected only CrOS so shouldn't affect performance on windows.

Comment 7 by trchen@chromium.org, Jan 31 2018

Mergedinto: 806848
Status: Duplicate (was: Assigned)
I think this is the same issue as 806848 and 768612. I'll revert the reland 'Reland "LayoutView::StyleWillChange viewport invalidation"', which needs manual rebase. I'll finish that this afternoon.
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