All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=788366

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=972929922d78ac3664f7405fe306dbdec600e03d5dc87973505ac9d5e9e7ed64


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

android-webview-nexus5X

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8962043318237265856

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

Suspected Commit
  Author : Michael Achenbach
  Commit : e93cb0e2b895f5813affb1df033d36a03ab222f6
  Date   : Wed Nov 22 09:42:03 2017
  Subject: Revert "[heap] Removed keep-one-unused-page concept in sweeper."

Bisect Details
  Configuration: android_webview_arm64_aosp_perf_bisect
  Benchmark    : system_health.memory_mobile
  Metric       : memory:webview:all_processes:reported_by_os:system_memory:proportional_resident_size_avg/browse_media/browse_media_youtube
  Change       : 4.25% | 176648293.333 -> 184157114.667

Revision                           Result                     N
chromium@518589                    176648293 +- 7995633       6      good
chromium@518615                    175899408 +- 3748403       6      good
chromium@518622                    178378626 +- 9903880       9      good
chromium@518625                    177659493 +- 7076529       6      good
chromium@518626                    175704848 +- 6033387       6      good
chromium@518626,v8@25a753383e      179312059 +- 12264266      9      good
chromium@518626,v8@e93cb0e2b8      185314917 +- 3334581       6      bad       <--
chromium@518626,v8@ffa30ced17      185667344 +- 3210386       6      bad
chromium@518627                    186226619 +- 3604384       6      bad
chromium@518628                    185342907 +- 5750908       6      bad
chromium@518641                    186457019 +- 2038595       6      bad
chromium@518692                    184424891 +- 3643530       6      bad
chromium@518794                    184157115 +- 5241572       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=browse.media.youtube 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/8962043318237265856


For feedback, file a bug with component Speed>Bisection