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Issue 740535 link

Starred by 1 user
Status: Duplicate
Merged: issue 735071
Owner:
yhirano@chromium.org
Closed: Jul 2017
Cc:
yhirano@chromium.org
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: ----



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36.7% improvement in loading.desktop at 480313:480357

Project Member Reported by yhirano@chromium.org, Jul 10 2017 
See the link to graphs below.
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Jul 10 2017 

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=740535

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=d9bd8436f3a1f12494e02aebba67c6422b91d35c0c79fa8db11f7a8f05234287


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

chromium-rel-mac12-mini-8gb
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Jul 10 2017 


=== BISECT JOB RESULTS ===
Bisect was unable to run to completion

Error: INFRA_FAILURE

The bisect was able to narrow the range, you can try running with:
  good_revision: 06e980861f8b1a81c4d5da2f667f44336cab385d
  bad_revision : cd4e730743d522affeae07a1280792359f7856b1

If failures persist contact the team (see below) and report the error.


Bisect Details
  Configuration: mac_10_12_mini_8gb_perf_bisect
  Benchmark    : loading.desktop
  Metric       : timeToFirstMeaningfulPaint_avg/pcv1-cold/FarsNews

Revision             Result                  N
chromium@480312      1157.0 +- 478.571       8      good
chromium@480335      1320.03 +- 973.23       6      good
chromium@480341      1155.21 +- 172.09       8      good
chromium@480343      867.346 +- 1196.38      9      bad
chromium@480344      781.255 +- 336.2        6      bad
chromium@480346      786.505 +- 651.444      9      bad
chromium@480357      727.327 +- 73.285       5      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 --story-filter=FarsNews loading.desktop

More information on addressing performance regressions:
  http://g.co/ChromePerformanceRegressions

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8974450463289144560


For feedback, file a bug with component Speed>Bisection
Project Member

Comment 5 by 42576172...@developer.gserviceaccount.com, Jul 11 2017

Mergedinto: 735071
Status: Duplicate (was: Assigned)

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

Suspected Commit
  Author : Yutaka Hirano
  Commit : 84047549ac37bab70d7306566c912e59131f3e1f
  Date   : Mon Jun 19 04:16:15 2017
  Subject: [Loading] Save one post-task when the data pipe is ready on arrival

Bisect Details
  Configuration: mac_10_12_mini_8gb_perf_bisect
  Benchmark    : loading.desktop
  Metric       : timeToFirstMeaningfulPaint_avg/pcv1-cold/FarsNews
  Change       : 50.50% | 1412.5945 -> 699.257000001

Revision             Result                  N
chromium@480312      1412.59 +- 1587.18      6      good
chromium@480335      1120.12 +- 648.877      6      good
chromium@480341      1333.14 +- 1486.91      9      good
chromium@480342      765.361 +- 585.461      9      bad       <--
chromium@480343      820.488 +- 1026.73      9      bad
chromium@480344      719.71 +- 106.606       5      bad
chromium@480346      710.179 +- 102.697      5      bad
chromium@480357      699.257 +- 108.384      5      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 --story-filter=FarsNews loading.desktop

More information on addressing performance regressions:
  http://g.co/ChromePerformanceRegressions

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8974403035264047984


For feedback, file a bug with component Speed>Bisection
►

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