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7%-9.4% regression in rasterize_and_record_micro.top_25 at 534985:535029

Project Member Reported by sullivan@chromium.org, Feb 12 2018

Issue description

See the link to graphs below.
 
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Feb 12 2018

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=811328

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=4ef592ed686c309f5212479c357e117de39c7091f239ccd6fc8f9ecffdb55936


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

android-nexus6
android-nexus7v2
Project Member

Comment 4 by 42576172...@developer.gserviceaccount.com, Feb 13 2018

😿 Pinpoint job stopped with an error.
https://pinpoint-dot-chromeperf.appspot.com/job/14f5a85d840000
Project Member

Comment 6 by 42576172...@developer.gserviceaccount.com, Feb 15 2018

😿 Pinpoint job stopped with an error.
https://pinpoint-dot-chromeperf.appspot.com/job/16976b2d840000
Project Member

Comment 7 by 42576172...@developer.gserviceaccount.com, Feb 15 2018

Cc: bcwh...@chromium.org lizeb@chromium.org holte@chromium.org peter@chromium.org gab@chromium.org beaufort...@gmail.com apaci...@chromium.org noel@chromium.org dcheng@chromium.org steimel@chromium.org haraken@chromium.org oetu...@nvidia.com cwallez@chromium.org treib@chromium.org clamy@chromium.org dgozman@chromium.org jmad...@chromium.org alexclarke@chromium.org skyos...@chromium.org mtklein@chromium.org mlamouri@chromium.org caseq@chromium.org guidou@chromium.org mattcary@chromium.org ellyjo...@chromium.org mdjones@chromium.org altimin@chromium.org manojgupta@google.com
Owner: oetu...@nvidia.com
Status: Assigned (was: Untriaged)
📍 Found significant differences after each of 12 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/14c2132d840000

Revert "Notifications: Enable inline settings for new-style notifications" by ellyjones@chromium.org
https://chromium.googlesource.com/chromium/src/+/5a64040dc63c39874d952905d188ba398464d62d

Cleanup: Remove Article Attachments code from components/dom_distiller by treib@chromium.org
https://chromium.googlesource.com/chromium/src/+/ef7ed225b3a0b5d4f0f77c837eb00537fa6d593d

WebScopedVirtualTimePauser to optionally advance virtual time by alexclarke@chromium.org
https://chromium.googlesource.com/chromium/src/+/b28db5465a47c4d68d4511a4faadf4636df28f86

[Picture-in-Picture] Add comments to PictureInPictureController by beaufort.francois@gmail.com
https://chromium.googlesource.com/chromium/src/+/7dba4c6a1c56a8e0b6fe9e5dc93af286009a86d3

Do configurable sampling of UKM. by bcwhite@chromium.org
https://chromium.googlesource.com/chromium/src/+/88fadd97d856d3430c5fc2740cc83fb37c593444

cygprofile: Change error logging to IMMEDIATE_CRASH. by mattcary@chromium.org
https://chromium.googlesource.com/chromium/src/+/0162a9b1e7d6902134b1d4d12a8aa33722a84b8d

Resolve chunk copy TODO: use INFLATE_FAST_MIN_INPUT/OUTPUT by noel@chromium.org
https://chromium.googlesource.com/chromium/src/+/4982484356f4c052358a1e62daadd98ed5e29100

Fix an alignment issue reported by ASan. by manojgupta@google.com
https://chromium.googlesource.com/chromium/src/+/6f7ee4bf915be08d284f383940cab70f08d8740b

Disable flaky MemoryTracingBrowserTest.TestHeapProfilingPseudo on Mac by guidou@chromium.org
https://chromium.googlesource.com/chromium/src/+/b9a814ec2034a8f3dcf1a85edb36326b5b91848f

Reland "DevTools: emit requestWillBeSent & responseReceived for nav requests from browser" by caseq@chromium.org
https://chromium.googlesource.com/chromium/src/+/84e18366aa62b0adf17ccc9f2a88642915dfd711

[Picture-in-Picture] Show/hide PiP button when appropriate by beaufort.francois@gmail.com
https://chromium.googlesource.com/chromium/src/+/83c30470634611cf7a9e4eeccbe881dc3a275641

Move symbol table initialization to SymbolTable.cpp by oetuaho@nvidia.com
https://chromium.googlesource.com/angle/angle/+/29bda81585d8d11460f5b53b99980f80a76d3cae

Understanding performance regressions:
  http://g.co/ChromePerformanceRegressions
Owner: vmp...@chromium.org
Assigning to benchmark owner.

vmpstr, the benchmark is either to sensitive or too noisy to bisect effectively here.

For 'Reland "DevTools: emit requestWillBeSent & responseReceived for nav requests from browser"', the benchmark does bump up with the land of r534878, down with the revert r534962 and back up with the reland r535020. But we're also seeing bumps at all the other CLs listed, which makes it hard to do a good bisect.

Comment 9 by vmp...@chromium.org, Feb 22 2018

Yeah I think the amount it moves the needle is small enough to be within the noise, making the bisect pretty hard. FWIW, I think the benchmark is still providing a useful signal even if this particular regression is hard to track down :\
Status: WontFix (was: Assigned)
Thanks! WontFix-ing this bug then.

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