All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=739309

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgnsekoQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgnsq2qwsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgnoeGuwsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg3u2zuwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg3rDMqwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg3un3uQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgnvOcvwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgnu69qQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg3u6uvAoM


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

android-nexus5
android-nexus7v2
android-one
chromium-rel-mac11-air

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8974917616711552320

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

Suspected Commit
  Author : Ulan Degenbaev
  Commit : f341bb0f623821e56349735e47e1a9094f65d9a3
  Date   : Fri Jun 30 12:03:04 2017
  Subject: Revert "[heap] Allow a minimum semi-space size of 512K."

Bisect Details
  Configuration: android_one_perf_bisect
  Benchmark    : smoothness.sync_scroll.key_mobile_sites_smooth
  Metric       : first_gesture_scroll_update_latency/http___answers.yahoo.com_question_index?qid_20110117024343AAopj8f
  Change       : 160.00% | 17.7583333333 -> 46.1715

Revision                           Result                  N
chromium@483683                    17.7583 +- 11.9794      6      good
chromium@483707                    16.425 +- 2.92168       6      good
chromium@483719                    16.6532 +- 9.98539      6      good
chromium@483725                    15.9078 +- 6.95982      6      good
chromium@483728                    18.9045 +- 10.4834      6      good
chromium@483729                    14.9947 +- 4.82381      6      good
chromium@483729,v8@ca93156294      15.7393 +- 5.34303      6      good
chromium@483729,v8@f341bb0f62      43.6998 +- 16.5502      6      bad       <--
chromium@483729,v8@fa4314da8b      45.5838 +- 12.6807      6      bad
chromium@483729,v8@bfbabce113      45.2718 +- 9.14061      6      bad
chromium@483730                    46.9605 +- 9.95209      6      bad
chromium@483731                    42.8685 +- 9.68778      6      bad
chromium@483778                    46.1715 +- 12.8296      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=http...answers.yahoo.com.question.index.qid.20110117024343AAopj8f smoothness.sync_scroll.key_mobile_sites_smooth

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8974917616711552320


For feedback, file a bug with component Speed>Bisection