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Issue 788330 link

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Issue metadata

Status: WontFix
Owner: ----
Closed: Jan 2018
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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34.9% regression in blink_perf.layout at 518183:518253

Project Member Reported by hjd@google.com, Nov 24 2017

Issue description

See the link to graphs below.
 
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Nov 24 2017

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=788330

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=9628727c5891e91bdb540334068ab481392b2b8333559c1a4145e1f814fa67ac


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

android-webview-nexus5X
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Nov 25 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: 7754b0fbded6c3c0e3329a38d480f1c30e53de8a
  bad_revision : 15c26a015b0ebea15b0d77ec51a8616f7bc0685b

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


Bisect Details
  Configuration: android_webview_arm64_aosp_perf_bisect
  Benchmark    : blink_perf.layout
  Metric       : floats_100_100_nested/floats_100_100_nested

Revision             Result                  N
chromium@518182      579.533 +- 33.3794      14      good
chromium@518184      1133.41 +- 9.81687      6       bad
chromium@518185      1134.66 +- 12.7555      6       bad
chromium@518187      1135.4 +- 14.1095       6       bad
chromium@518191      1127.04 +- 11.242       6       bad
chromium@518200      1122.88 +- 3.54022      6       bad
chromium@518218      775.598 +- 933.892      14      bad
chromium@518253      593.618 +- 53.8831      14      bad

Please refer to the following doc on diagnosing blink_perf regressions:
  https://chromium.googlesource.com/chromium/src/+/master/docs/speed/benchmark_harnesses/blink_perf.md

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-webview --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests blink_perf.layout

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8962048099272175488


For feedback, file a bug with component Speed>Bisection
Status: WontFix (was: Untriaged)
This metric seems to be bimodal.

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