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Issue 651806 link

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Issue metadata

Status: Duplicate
Merged: issue 651807
Owner:
Last visit > 30 days ago
Closed: Oct 2016
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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14.1% regression in blink_perf.layout at 421602:421670

Project Member Reported by pmeenan@chromium.org, Sep 30 2016

Issue description

See the link to graphs below.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=651806

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICglcK4qwoM


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

android-galaxy-s5
Mergedinto: 651807
Status: Duplicate (was: Assigned)

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


===== SUSPECTED CL(s) =====
Subject : Add histograms for parseAuthorStyleSheet and updateStyle
Author  : csharrison
Commit description:
  
BUG= 642722 

Review-Url: https://codereview.chromium.org/2344633005
Cr-Commit-Position: refs/heads/master@{#421659}
Commit  : 78f6cc334b7c0231a6a9a6fe6de9f7183c5796ce
Date    : Wed Sep 28 22:22:09 2016


===== TESTED REVISIONS =====
Revision         Mean     Std Dev  N  Good?
chromium@421601  21141.2  74.0333  5  good
chromium@421636  21293.7  86.6039  4  good
chromium@421653  20771.3  68.5217  5  good
chromium@421658  20676.9  115.834  5  good
chromium@421659  17821.4  168.569  5  bad    <--
chromium@421660  17824.9  124.705  5  bad
chromium@421662  17969.7  130.961  5  bad
chromium@421670  18017.7  93.4725  5  bad

Bisect job ran on: android_s5_perf_bisect
Bug ID: 651806

Test Command: src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --also-run-disabled-tests blink_perf.layout
Test Metric: SimpleTextPathLineLayout/SimpleTextPathLineLayout
Relative Change: 14.77%
Score: 99.9

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/android_s5_perf_bisect/builds/1046
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9000093785858472288


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=4773361232642048

| 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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