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Issue metadata

Status: Duplicate
Merged: issue 638025
Owner:
Closed: Aug 2016
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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12% regression in blink_perf.shadow_dom at 411655:411685

Project Member Reported by benjhayden@chromium.org, Aug 15 2016

Issue description

See the link to graphs below.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=638026

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg9teQsgoM


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

chromium-rel-mac-hdd
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Aug 16 2016

Mergedinto: 638025
Status: Duplicate (was: Assigned)

===== BISECT JOB RESULTS =====
Status: completed


===== SUSPECTED CL(s) =====
Subject : Switching from the old (CLD2) to the new (CLD3) language detector.
Author  : abakalov
Commit description:
  
Note:
I ran tools/linux/dump-static-initializers.py on CLD3. It did not find any static initializers.

BUG=624904

Review-Url: https://codereview.chromium.org/2244683002
Cr-Commit-Position: refs/heads/master@{#411677}
Commit  : 5b70d355c174c026f936cb5ef795b4d66c1cc4f5
Date    : Fri Aug 12 16:50:05 2016


===== TESTED REVISIONS =====
Revision         Mean     Std Dev  N   Good?
chromium@411654  68.6663  1.49829  8   good
chromium@411670  69.5018  5.03018  8   good
chromium@411674  68.2856  1.43697  8   good
chromium@411676  69.4829  4.14109  12  good
chromium@411677  76.686   6.92408  12  bad    <--
chromium@411678  75.4885  5.39049  8   bad
chromium@411685  74.0219  2.66646  8   bad

Bisect job ran on: mac_hdd_perf_bisect
Bug ID: 638026

Test Command: src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --also-run-disabled-tests blink_perf.shadow_dom
Test Metric: ChangingClassNameShadowDOM/ChangingClassNameShadowDOM
Relative Change: 8.75%
Score: 95.0

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/mac_hdd_perf_bisect/builds/736
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9004218896858303216


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5771809144700928

| 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 Tests>AutoBisect.  Thank you!

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