All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=748532

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=6d53f5ac9952b2639c56cae051be9bfc1a48217aa40acff590c7662f3f718f51


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

android-nexus5
android-nexus5X
android-nexus6
android-nexus7v2
android-one
android-webview-nexus5X

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8973089368586979056

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

Suspected Commit
  Author : Ulan Degenbaev
  Commit : 176a2b24fb23a0c9a3bc9eec27f6445dbfa5ab27
  Date   : Wed Jul 19 13:04:47 2017
  Subject: [heap] Reland "[heap] Allow a minimum semi-space size of 512K."

Bisect Details
  Configuration: android_nexus5_perf_bisect
  Benchmark    : v8.browsing_mobile
  Metric       : v8-gc-total_avg/browse_chrome/browse_chrome_omnibox
  Change       : 491.50% | 1.25965451588 -> 7.45084080055

Revision                           Result                   N
chromium@488740                    1.25965 +- 0.457731      6      good
chromium@488744                    1.32732 +- 0.428876      6      good
chromium@488745                    1.17862 +- 0.565533      6      good
chromium@488745,v8@ae9a2d38f3      1.37074 +- 0.302724      9      good
chromium@488745,v8@91c1a81d0e      1.25789 +- 0.510235      6      good
chromium@488745,v8@bb29f9a4d6      1.31525 +- 0.385126      6      good
chromium@488745,v8@176a2b24fb      6.78551 +- 1.19214       6      bad       <--
chromium@488745,v8@7cfd0c249e      6.06629 +- 5.27275       9      bad
chromium@488745,v8@b23b8c088c      6.67861 +- 0.275309      6      bad
chromium@488746                    7.47044 +- 0.275969      6      bad
chromium@488748                    7.53713 +- 0.109427      6      bad
chromium@488755                    7.44853 +- 0.315367      6      bad
chromium@488770                    7.30285 +- 0.312932      6      bad
chromium@488800                    7.52389 +- 0.41473       6      bad
chromium@488859                    7.45084 +- 0.47244       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=browse.chrome.omnibox v8.browsing_mobile

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8973089368586979056


For feedback, file a bug with component Speed>Bisection