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Issue 821081 link

Starred by 1 user
Status: Fixed
Owner:
alexilin@chromium.org
Closed: Apr 2018
Cc:
geoffl...@chromium.org
csharrison@chromium.org
alexilin@chromium.org
fs...@chromium.org
jrumm...@chromium.org
zmo@chromium.org
lizeb@chromium.org
drott@chromium.org
EstimatedDays: ----
NextAction: ----
OS: Windows
Pri: 2
Type: Bug-Regression



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5.6%-185.2% regression in media.desktop at 541400:541500

Project Member Reported by jrumm...@chromium.org, Mar 12 2018 
See the link to graphs below.
Project Member

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

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=821081

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=e8b992ae02e96daa587692ef5e4964423bca3e3ef7efa7d62723b06f8b85c5ec


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

chromium-rel-win7-gpu-intel
chromium-rel-win7-gpu-nvidia
chromium-rel-win8-dual
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Mar 12 2018

Cc: drott@chromium.org lizeb@chromium.org alexilin@chromium.org fs...@chromium.org csharrison@chromium.org
Owner: fs...@chromium.org
Status: Assigned (was: Untriaged)
📍 Found significant differences after each of 2 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/12d2cf6e440000

predictors: Allow port in urls. by alexilin@chromium.org
https://chromium.googlesource.com/chromium/src/+/48e8746b747754f10a3494523b07f0a492ec659d

Add support for mid ligature position on ShapeResult by fserb@chromium.org
https://chromium.googlesource.com/chromium/src/+/6e39ad9cab1d1907952309b7612edc2436762396

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

Comment 4 by alexilin@chromium.org, Mar 13 2018

Cc: geoffl...@chromium.org zmo@chromium.org
 Issue 821076  has been merged into this issue.

Comment 5 by alexilin@chromium.org, Mar 13 2018

Labels: OS-Windows
Owner: alexilin@chromium.org
Status: Started (was: Assigned)
The regression is caused by my change, suspecting slow Windows I/O, investigating.

Comment 6 by drott@chromium.org, Mar 13 2018 

Thanks for taking this on, alexilin@. 

> Add support for mid ligature position on ShapeResult by fserb@chromium.org
https://chromium.googlesource.com/chromium/src/+/6e39ad9cab1d1907952309b7612edc2436762396

has been reverted.

Comment 7 by alexilin@chromium.org, Apr 5 2018

Status: Fixed (was: Started)
The regression was fixed at the point #546940 (https://chromium-review.googlesource.com/c/chromium/src/+/980876), confirmed by the graphs.
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