All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=788362

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=f8e8bf849fafc17610dbe001a2acc8e71aaab7e0c4ed5d6f6e8fe6d0d991762d


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

android-webview-nexus5X

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8962044180677063232

=== 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:native_heap:proportional_resident_size_avg/browse_social/browse_social_instagram
  Change       : 10.30% | 59558338.6667 -> 65693464.0

Revision                           Result                   N
chromium@518589                    59558339 +- 2728145      6      good
chromium@518615                    59408493 +- 2460401      6      good
chromium@518622                    59183213 +- 2242629      6      good
chromium@518625                    59111192 +- 1790746      6      good
chromium@518626                    60184003 +- 2769898      6      good
chromium@518626,v8@25a753383e      59556632 +- 1978518      6      good
chromium@518626,v8@e93cb0e2b8      66088387 +- 1728404      6      bad       <--
chromium@518626,v8@ffa30ced17      66538264 +- 995500       6      bad
chromium@518627                    66042648 +- 1990809      6      bad
chromium@518628                    66229699 +- 1198510      6      bad
chromium@518641                    65537816 +- 2150560      6      bad
chromium@518692                    65695000 +- 2159442      6      bad
chromium@518794                    65693464 +- 1328132      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.social.instagram 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/8962044180677063232


For feedback, file a bug with component Speed>Bisection