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Issue metadata

Status: Duplicate
Owner: ----
Closed: May 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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14.2% regression in blink_perf.paint at 470255:470307

Project Member Reported by hjd@google.com, May 11 2017

Issue description

See the link to graphs below.
 

Comment 1 by hjd@google.com, May 11 2017

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=721336

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgqpvPsgoM


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

chromium-rel-win7-gpu-intel
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, May 11 2017

Mergedinto: 721287
Status: Duplicate (was: Untriaged)

=== BISECT JOB RESULTS ===
Perf regression found with culprit

Suspected Commit
  Author : nainar
  Commit : 5a563421457c31c1bb6cdac72c899db056f1adc7
  Date   : Tue May 09 10:04:48 2017
  Subject: Move border-*-width out of BorderValue and store on SurroundData in ComputedStyle instead

Bisect Details
  Configuration: winx64intel_perf_bisect
  Benchmark    : blink_perf.paint
  Metric       : large-table-collapsed-border-change/large-table-collapsed-border-change
  Change       : 6.86% | 92.6800833333 -> 99.0353333333

Revision             Result                   N
chromium@470254      92.6801 +- 2.67989       6      good
chromium@470268      87.0442 +- 0.544123      6      good
chromium@470270      86.4218 +- 1.11841       6      good
chromium@470271      86.2759 +- 0.857184      6      good
chromium@470272      97.9053 +- 2.63195       6      bad       <--
chromium@470275      97.9455 +- 1.31495       6      bad
chromium@470281      98.7386 +- 2.24712       6      bad
chromium@470307      99.0353 +- 2.99785       6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release_x64 --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests blink_perf.paint

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8979891060772418288

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=6337790733713408


| O O | Visit http://www.chromium.org/developers/speed-infra/perf-bug-faq
|  X  | for more information addressing perf regression bugs. For feedback,
| / \ | file a bug with component Speed>Bisection.  Thank you!

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