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Issue metadata

Status: Duplicate
Merged: issue 716394
Owner: ----
Closed: May 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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5.7%-31.6% regression in blink_perf.bindings at 467538:467677

Project Member Reported by mustaq@chromium.org, May 3 2017

Issue description

See the link to graphs below.
 
Mergedinto: 716394
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : nednguyen
  Commit : c5cc2a4f4e1ae4dfd1459cba00e7d7a217bc1f70
  Date   : Thu Apr 27 11:25:47 2017
  Subject: Support tracing metrics for measureTime & measureFrameTime methods in blink_perf (Reland)

Bisect Details
  Configuration: mac_10_12_mini_8gb_perf_bisect
  Benchmark    : blink_perf.bindings
  Metric       : serialize-nested-array/serialize-nested-array
  Change       : 36.74% | 0.270833333333 -> 0.370333333333

Revision             Result                     N
chromium@467596      0.270833 +- 0.0503074      6      good
chromium@467634      0.2625 +- 0.0367355        6      good
chromium@467636      0.266833 +- 0.0319818      6      good
chromium@467637      0.367 +- 0.063498          6      bad       <--
chromium@467639      0.350833 +- 0.0411684      6      bad
chromium@467644      0.373833 +- 0.0577307      6      bad
chromium@467653      0.364333 +- 0.031102       6      bad
chromium@467671      0.370333 +- 0.0380438      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 blink_perf.bindings

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8980604425523333952

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=6715373807730688


| 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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