All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=731666

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5u-T4woM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglpb8qgsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglpb8qgkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglti-pgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglvS7kQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5rfnkwgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5r2-4wgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglpK_rAsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5tK2mAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglvS74QkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5tGUqQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5r2-owoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglqj2owoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5uujwAgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5uau7wgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5rSKwQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5uvkuwkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5tLdlAgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5pnFuQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgprX17wsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgppPJ8goM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgpuWT-wsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgpp-_iggM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgxsL7_gkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5tPBrAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5vyeugoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5vyKqwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgpuqV5AgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5tPatQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5tzFvwkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5vC6tgkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5pqZsAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgpoWpnQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5tOspAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5sSEtgoM


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

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

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8977267733343380272

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

Suspected Commit
  Author : Ulan Degenbaev
  Commit : c8e6cdfdcee0319fec69926e074d047f668c6f8b
  Date   : Tue Jun 06 14:16:55 2017
  Subject: Revert "[heap] Use partial free when shrinking instead of uncommitting"

Bisect Details
  Configuration: android_webview_arm64_aosp_perf_bisect
  Benchmark    : system_health.memory_mobile
  Metric       : memory:webview:all_processes:reported_by_chrome:v8:effective_size_avg/load_tools/load_tools_stackoverflow
  Change       : 8.74% | 5988824.0 -> 6512364.0

Revision                           Result                  N
chromium@477426                    5988824 +- 21115.7      6      good
chromium@477438                    5989136 +- 5564.02      6      good
chromium@477444                    6001168 +- 68052.8      6      good
chromium@477447                    5990695 +- 6929.81      6      good
chromium@477448                    5990549 +- 5135.3       6      good
chromium@477448,v8@8a15026270      5988972 +- 6385.58      6      good
chromium@477448,v8@c8e6cdfdce      6512988 +- 5349.23      6      bad       <--
chromium@477448,v8@5005faed5c      6511157 +- 20368.1      6      bad
chromium@477449                    6515471 +- 2851.63      6      bad
chromium@477472                    6512364 +- 10939.2      6      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=load.tools.stackoverflow system_health.memory_mobile

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8977267733343380272

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5278022543867904


| O O | Visit http://www.chromium.org/developers/speed-infra/perf-bug-faq
|  X  | for more information addressing perf regression bugs. For feedback,
| / \ | file a bug with component Speed>Bisection.  Thank you!