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Issue 754801 link

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Issue metadata

Status: Duplicate
Merged: issue 754794
Owner: ----
Closed: Aug 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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95.9% improvement in memory.long_running_idle_gmail_background_tbmv2 at 493070:493159

Project Member Reported by dcheng@chromium.org, Aug 11 2017

Issue description

This seems too good to be true.
 
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Aug 11 2017

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=754801

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=50b478268666276ea602c3c4ff703556c44c1c17a7b1704e93bea10349e19d1e


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

chromium-rel-win7-gpu-intel
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Aug 11 2017

Mergedinto: 754794
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Fredrik Hubinette
  Commit : 91983d3c528c0181129ee51a09077fda019e3e32
  Date   : Wed Aug 09 19:14:38 2017
  Subject: Add test and fixes for loading many videos on the same page.

Bisect Details
  Configuration: winx64intel_perf_bisect
  Benchmark    : memory.long_running_idle_gmail_background_tbmv2
  Metric       : memory:chrome:renderer_processes:reported_by_chrome:v8:allocated_objects_size_avg/memory:chrome:renderer_processes:reported_by_chrome:v8:allocated_objects_size_avg
  Change       : 95.92% | 72508766.1782 -> 2960552.0

Revision             Result                    N
chromium@493069      72508766 +- 10245900      6      good
chromium@493081      72388258 +- 9777053       6      good
chromium@493087      70717239 +- 7818982       6      good
chromium@493088      72747218 +- 7587016       6      good
chromium@493089      2960552 +- 0.0            6      bad       <--
chromium@493090      2960552 +- 0.0            6      bad
chromium@493092      2960552 +- 0.0            6      bad
chromium@493114      2960552 +- 0.0            6      bad
chromium@493159      2960552 +- 0.0            6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release_x64 --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests memory.long_running_idle_gmail_background_tbmv2

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8971533112744267408


For feedback, file a bug with component Speed>Bisection

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