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Issue 713580 link

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Issue metadata

Status: Duplicate
Merged: issue 713576
Owner: ----
Closed: Apr 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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17.2% regression in blink_perf.paint at 465179:465207

Project Member Reported by alexclarke@chromium.org, Apr 20 2017

Issue description

See the link to graphs below.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=713580

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgopHq4wgM


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

android-nexus7v2
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Apr 20 2017

Mergedinto: 713576
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : hidehiko
  Commit : ddefb10bee663f8d240c999309f37cc2f96d2e92
  Date   : Tue Apr 18 11:14:53 2017
  Subject: Revert of Back PaintRecord with PaintOpBuffer instead of SkPicture (patchset #42 id:810001 of https://codereview.chromium.org/2768143002/ )

Bisect Details
  Configuration: android_nexus7_perf_bisect
  Benchmark    : blink_perf.paint
  Metric       : large-table-background-change-with-visible-collapsed-borders/large-table-background-change-with-visible-collapsed-borders
  Change       : 19.21% | 896.050583333 -> 1068.16908333

Revision             Result                  N
chromium@465178      896.051 +- 29.0576      6      good
chromium@465193      945.539 +- 19.794       6      good
chromium@465195      946.355 +- 16.2411      6      good
chromium@465196      1054.38 +- 25.5697      6      bad       <--
chromium@465197      1090.28 +- 17.0615      6      bad
chromium@465200      1046.82 +- 31.9729      6      bad
chromium@465207      1068.17 +- 14.2454      6      bad

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

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8981811066642433584

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=6653867896340480


| 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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