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Issue 724623 link

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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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7.7%-148.4% regression in loading.desktop at 472339:472450

Project Member Reported by benhenry@google.com, May 19 2017

Issue description

graphs to follow
 

Comment 1 by benhenry@google.com, May 19 2017

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=724623

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2ozKuQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2puYogoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2u_apgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgmvn_swsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2q2xtAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2sjhqAkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2oHZuwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2o-usgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2tr_8AgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgmt_jtAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2saavQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2r75rwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2vyzpQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2uiwpgkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgmt_5pQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2saavQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgmt-euAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2sbMrAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2vqfrwkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgmt-KqQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2qLNvQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgmtukogoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2obpqAkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgmpuRpAkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgmvmbogoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2rnPswoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2pSVuwkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgmvmNvQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgmvnRrAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2qKxrAkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2uT9tQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2rmzogoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2qKxrAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2tS2oQsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2qKmtQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg2sS5_AgM


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

chromium-rel-win10
linux-release
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, May 19 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: linux_perf_bisect
  Benchmark    : loading.desktop
  Metric       : cpuTimeToFirstMeaningfulPaint_avg/pcv1-cold/2ch
  Change       : 157.38% | 49.6756666667 -> 127.853666667

Revision             Result                  N
chromium@472338      49.6757 +- 9.73088      6      good
chromium@472385      48.0642 +- 5.54562      6      good
chromium@472408      48.6775 +- 6.01707      6      good
chromium@472411      48.8525 +- 3.75007      6      good
chromium@472412      47.6578 +- 5.61014      6      good
chromium@472413      148.522 +- 53.7688      6      bad       <--
chromium@472414      129.915 +- 12.936       6      bad
chromium@472420      132.987 +- 23.388       6      bad
chromium@472431      127.854 +- 8.73534      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 --story-filter=2ch loading.desktop

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8979136537383849968

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=6432553919053824


| 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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