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Issue metadata

Status: Duplicate
Merged: issue 724095
Owner: ----
Closed: May 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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23.2%-42.2% regression in blink_perf.layout at 472411:472426

Project Member Reported by tdres...@chromium.org, May 18 2017

Issue description

See the link to graphs below.
 
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, May 19 2017


=== BISECT JOB RESULTS ===
Bisect failed for unknown reasons

Please contact the team (see below) and report the error.


Bisect Details
  Configuration: android_webview_nexus6_aosp_perf_bisect
  Benchmark    : blink_perf.layout
  Metric       : character_fallback/character_fallback


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.layout

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8979252316367416768

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5777885073244160


| 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!
Project Member

Comment 5 by 42576172...@developer.gserviceaccount.com, May 21 2017

Mergedinto: 724095
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : drott
  Commit : fbec38011870753cffb3cb2ff98aa0c00c63b25c
  Date   : Wed May 17 10:49:03 2017
  Subject: Reland: Compile FreeType with HarfBuzz support

Bisect Details
  Configuration: android_webview_nexus6_aosp_perf_bisect
  Benchmark    : blink_perf.layout
  Metric       : character_fallback/character_fallback
  Change       : 22.62% | 347.920666667 -> 426.6315

Revision             Result                  N
chromium@472410      347.921 +- 6.70487      6      good
chromium@472412      347.641 +- 12.5063      6      good
chromium@472413      430.503 +- 27.1021      6      bad       <--
chromium@472414      423.16 +- 21.3918       6      bad
chromium@472418      425.617 +- 29.2551      6      bad
chromium@472426      426.631 +- 28.5207      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.layout

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8979174896440313664

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5777885073244160


| 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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