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Issue 759692 link

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Issue metadata

Status: Duplicate
Merged: issue 758277
Owner: ----
Closed: Aug 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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44.1% regression in tracing.tracing_with_debug_overhead at 495120:495354

Project Member Reported by kraynov@chromium.org, Aug 28 2017

Issue description

See the link to graphs below.
 
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Aug 28 2017

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=759692

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=3aeadc48046f49fac1ee5988361124ae7cbfd49f5aa8f452bf1ff0f6aeb124d6


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

android-nexus7v2
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Aug 28 2017

Mergedinto: 758277
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Charles Harrison
  Commit : 007abddf6ad7f7d3f1491217119e3e7166faaace
  Date   : Thu Aug 17 21:39:49 2017
  Subject: Testing config: doc.write blocking change on slow connections only

Bisect Details
  Configuration: android_nexus7_perf_bisect
  Benchmark    : tracing.tracing_with_debug_overhead
  Metric       : trace_size_avg/Wikipedia
  Change       : 42.15% | 12873467.6667 -> 18299731.0

Revision             Result                  N
chromium@495119      12873468 +- 390514      6      good
chromium@495237      13019166 +- 480880      6      good
chromium@495296      13158244 +- 648717      6      good
chromium@495325      13102394 +- 246200      6      good
chromium@495326      13125846 +- 592130      6      good
chromium@495327      18376982 +- 219202      6      bad       <--
chromium@495329      18471289 +- 192647      6      bad
chromium@495333      18381466 +- 289901      6      bad
chromium@495340      18205794 +- 310817      6      bad
chromium@495354      18299731 +- 329202      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=Wikipedia tracing.tracing_with_debug_overhead

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8969999974232109440


For feedback, file a bug with component Speed>Bisection

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