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Issue metadata

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



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13.9% regression in blink_perf.bindings at 448604:448621

Project Member Reported by briander...@chromium.org, Feb 9 2017

Issue description

See the link to graphs below.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=690243

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg6Jv9hQkM


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

android-webview-nexus6
Mergedinto: 690413
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : jgruber
  Commit : 7d15175a0f59dfc15cf811a45e358dd4cc9b36e9
  Date   : Tue Feb 07 10:07:57 2017
  Subject: Revert of [regexp] Add stub for RegExpExec instead of inlining (patchset #1 id:1 of https://codereview.chromium.org/2677073004/ )

Bisect Details
  Configuration: android_webview_nexus6_aosp_perf_bisect
  Benchmark    : blink_perf.bindings
  Metric       : first-child/first-child
  Change       : 15.55% | 231.881259152 -> 195.834680335

Revision                           Result                   N
chromium@448603                    231.881 +- 1.04437       6      good
chromium@448612                    231.56 +- 0.885046       6      good
chromium@448617                    231.757 +- 1.37641       6      good
chromium@448619                    230.673 +- 1.90236       6      good
chromium@448619,v8@f4739ea863      231.674 +- 1.07335       6      good
chromium@448619,v8@7d15175a0f      189.455 +- 1.32519       6      bad       <--
chromium@448619,v8@009e8b11e2      189.569 +- 0.431217      6      bad
chromium@448620                    189.512 +- 0.497854      5      bad
chromium@448621                    195.835 +- 35.0179       6      bad

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

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8988180293812776192

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=6452744958771200


| 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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