All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=771577

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=880f44921869408ce98f700d6c42211ec67b520cfc6b26acecaf20a0114a7be1


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

android-nexus7v2
android-webview-nexus6

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8966669137178798576

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

Suspected Commit
  Author : Marja Hölttä
  Commit : 40856948a64e2b76bc121a8841a763836dbf1b37
  Date   : Thu Sep 28 12:41:56 2017
  Subject: [parser] Skipping inner funcs: Turn off FLAG_preparser_scope_analysis.

Bisect Details
  Configuration: android_webview_nexus6_aosp_perf_bisect
  Benchmark    : v8.browsing_mobile
  Metric       : v8-gc-full-mark-compactor_max/browse_news/browse_news_reddit
  Change       : 63.24% | 23.3357777778 -> 38.0925

Revision                           Result                  N
chromium@505120                    23.3358 +- 8.85249      9      good
chromium@505166                    23.9267 +- 5.98223      6      good
chromium@505189                    22.8668 +- 6.05433      6      good
chromium@505201                    25.0728 +- 1.47119      6      good
chromium@505207                    23.5433 +- 3.74564      6      good
chromium@505210                    22.9064 +- 6.48897      8      good
chromium@505210,v8@4ba6f15ece      23.4401 +- 6.34968      9      good
chromium@505210,v8@40856948a6      36.664 +- 7.88765       4      bad       <--
chromium@505210,v8@193dcf7693      38.3362 +- 8.82165      5      bad
chromium@505210,v8@e1cdda2512      36.112 +- 9.90881       5      bad
chromium@505211                    40.0076 +- 1.28402      5      bad
chromium@505212                    38.7132 +- 8.36953      5      bad
chromium@505303                    38.0925 +- 7.84922      4      bad

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 --story-filter=browse.news.reddit 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/8966669137178798576


For feedback, file a bug with component Speed>Bisection