All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=741706

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=45cbeed40184d4ffe750e2d8f268a57513622703760d726b57bc988e410173c2


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

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

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8974257298559069360

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

Suspected Commit
  Author : Xianda Sun
  Commit : 0d09713458f374a911822779fa48bae96b6608ed
  Date   : Thu Jul 06 22:09:57 2017
  Subject: Revert "Revert "cc: Enable mask tiling""

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/load_news/load_news_irctc
  Change       : 0.65% | 51478808.0 -> 51815874.6667

Revision             Result                   N
chromium@484728      51478808 +- 603783       6       good
chromium@484745      51612294 +- 1053048      14      good
chromium@484750      51658374 +- 1533310      14      good
chromium@484751      52243679 +- 508249       9       bad       <--
chromium@484752      52225247 +- 979059       9       bad
chromium@484754      52214698 +- 1440636      14      bad
chromium@484762      52243395 +- 679503       6       bad
chromium@484795      51815875 +- 228614       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.news.irctc 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/8974257298559069360


For feedback, file a bug with component Speed>Bisection