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Issue metadata

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



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3%-5.2% regression in speedometer at 447214:447275

Project Member Reported by hablich@chromium.org, Feb 3 2017

Issue description

See the link to graphs below.
 
Mergedinto: 687481
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : jkummerow
  Commit : daad4319c960b714c270b2c603b1f03bbc6ade14
  Date   : Tue Jan 31 06:41:14 2017
  Subject: Put ThinStrings behind a flag (off by default)

Bisect Details
  Configuration: win_perf_bisect
  Benchmark    : speedometer
  Metric       : AngularJS-TodoMVC/AngularJS-TodoMVC
  Change       : 5.54% | 542.6265 -> 572.69125

Revision                           Result                  N
chromium@447213                    542.627 +- 20.169       6      good
chromium@447213,v8@daad4319c9      571.735 +- 20.9476      6      bad       <--
chromium@447213,v8@d224e4e7dc      568.75 +- 7.93127       6      bad
chromium@447214                    567.749 +- 11.9328      6      bad
chromium@447215                    572.066 +- 17.3142      6      bad
chromium@447216                    569.365 +- 9.79673      6      bad
chromium@447219                    570.131 +- 8.90766      6      bad
chromium@447224                    570.932 +- 15.6499      6      bad
chromium@447234                    572.691 +- 19.487       6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests speedometer

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8988679443756036336

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=6375268077273088


| 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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