All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=777287

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=b18edc6ca80c43e1c1421ee40f2193436426149a32d93bb667ace0a833d43994


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

android-webview-nexus5X

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8964961473132029296

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

Suspected Commit
  Author : Jakob Gruber
  Commit : f7b09b3bdd96b4bd686b413c7a26e13f08ac4601
  Date   : Mon Oct 16 16:04:12 2017
  Subject: Reland "[snapshot] Ship lazy TFJ builtins"

Bisect Details
  Configuration: android_webview_arm64_aosp_perf_bisect
  Benchmark    : system_health.memory_mobile
  Metric       : memory:webview:all_processes:reported_by_chrome:cc:effective_size_avg/browse_social/browse_social_twitter
  Change       : 13.49% | 45184097.4286 -> 51280805.4286

Revision                           Result                    N
chromium@509316                    45184097 +- 17948908      14      good
chromium@509324                    45981657 +- 18109531      14      good
chromium@509325                    47349260 +- 28274990      21      good
chromium@509325,v8@972d460f4f      45071457 +- 11015628      6       good
chromium@509325,v8@f7b09b3bdd      56060521 +- 5111438       6       bad       <--
chromium@509325,v8@efa038361d      54310358 +- 9966992       9       bad
chromium@509325,v8@6627b0aaf7      54408669 +- 6115218       9       bad
chromium@509326                    54537754 +- 6224414       14      bad
chromium@509328                    54604465 +- 21070745      14      bad
chromium@509331                    52445745 +- 12414046      9       bad
chromium@509346                    55127304 +- 0.0           6       bad
chromium@509376                    51280805 +- 20161417      14      bad

Please refer to the following doc on diagnosing memory regressions:
  https://chromium.googlesource.com/chromium/src/+/master/docs/memory-infra/memory_benchmarks.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 --story-filter=browse.social.twitter system_health.memory_mobile

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8964961473132029296


For feedback, file a bug with component Speed>Bisection