All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=780236

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=53bde7d6e8f320c837328c9ad726e7d7ce06acb3e1b024055453d95bf1977e4d


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

android-webview-nexus5X

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8964184318516571152

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

Suspected Commit
  Author : Nicolas Dossou-gbete
  Commit : a1f36fd3560487bb6f2c2e4d140422780f700c32
  Date   : Mon Oct 30 12:57:10 2017
  Subject: 📱 Roll android support library to 27.0.0

Bisect Details
  Configuration: android_webview_arm64_aosp_perf_bisect
  Benchmark    : system_health.memory_mobile
  Metric       : memory:webview:all_processes:reported_by_chrome:java_heap:effective_size_avg/load_media/load_media_youtube
  Change       : 0.94% | 20740310.6667 -> 20936119.0

Revision             Result                   N
chromium@512477      20740311 +- 2818.63      6      good
chromium@512478      20738999 +- 1931.75      6      good
chromium@512479      20936209 +- 2941.5       6      bad       <--
chromium@512480      20935715 +- 1626.68      6      bad
chromium@512482      20936106 +- 2345.96      6      bad
chromium@512486      20930715 +- 23790.7      6      bad
chromium@512495      20936462 +- 2524.99      6      bad
chromium@512512      20936119 +- 2773.55      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.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/8964184318516571152


For feedback, file a bug with component Speed>Bisection