All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=777307

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=fe9443f70dddd2f93d3f9b166b88a137a4d38dc1ad80a8214c322810d860ce19


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

android-nexus5
android-nexus5X
android-webview-nexus6
chromium-rel-win7-x64-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8964956730145446800

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

Suspected Commit
  Author : Alexei Filippov
  Commit : d0cf729782cf311d39d3b8934ef150ccf3ef9127
  Date   : Thu Oct 19 18:21:02 2017
  Subject: [runtime-call-stats] Temporarily change DCHECK to CHECK in RCS::Enter and LEAVE

Bisect Details
  Configuration: android_nexus5_perf_bisect
  Benchmark    : v8.runtimestats.browsing_mobile
  Metric       : V8 C++:duration_avg/browse_shopping/browse_shopping_avito
  Change       : 8.43% | 9912.32916667 -> 10748.2275

Revision                           Result                  N
chromium@510347                    9912.33 +- 196.36       6      good
chromium@510374                    10023.2 +- 452.913      6      good
chromium@510381                    10026.1 +- 92.3978      6      good
chromium@510382                    9940.29 +- 200.378      6      good
chromium@510382,v8@0454a842d1      9961.99 +- 88.7007      6      good
chromium@510382,v8@9b51519e52      9957.96 +- 216.665      6      good
chromium@510382,v8@f65251be3c      10008.5 +- 154.503      6      good
chromium@510382,v8@d0cf729782      10663.3 +- 263.35       6      bad       <--
chromium@510383                    10543.3 +- 339.821      6      bad
chromium@510385                    10491.6 +- 146.656      6      bad
chromium@510388                    10634.0 +- 144.259      6      bad
chromium@510401                    10748.2 +- 303.257      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.shopping.avito v8.runtimestats.browsing_mobile

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8964956730145446800


For feedback, file a bug with component Speed>Bisection