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Issue 701822 link

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Issue metadata

Status: Duplicate
Merged: issue 701361
Owner: ----
Closed: Mar 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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14.5% regression in blink_perf.css at 456306:456326

Project Member Reported by nzolghadr@chromium.org, Mar 15 2017

Issue description

See the link to graphs below.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=701822

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg9PzFpwoM


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

chromium-rel-win7-gpu-intel
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Mar 15 2017

Mergedinto: 701361
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : meade
  Commit : 3a001533b29c0fe28f2354285b2c2ac8d57d8ce6
  Date   : Mon Mar 13 05:26:20 2017
  Subject: Un-DCHECK-guard ThreadRestrictionVerifier for strings.

Bisect Details
  Configuration: winx64intel_perf_bisect
  Benchmark    : blink_perf.css
  Metric       : CSSPropertySetterGetterMethods/CSSPropertySetterGetterMethods
  Change       : 18.44% | 8332.11515029 -> 6795.91023186

Revision             Result                  N
chromium@456305      8332.12 +- 279.121      6      good
chromium@456316      8502.06 +- 173.094      6      good
chromium@456321      8245.53 +- 326.285      6      good
chromium@456322      8450.23 +- 111.723      6      good
chromium@456323      6941.92 +- 118.591      6      bad       <--
chromium@456324      6899.53 +- 217.524      6      bad
chromium@456326      6795.91 +- 240.808      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.css

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8985039055982542800

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=4932256533053440


| 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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