All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=792459

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=49af7755d63c4258873435076354c2c7fceca6de30c2c3f3538cf5eb095bbbb1


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

android-webview-nexus5X

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8960949255255278416

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

Suspected Commit
  Author : Chris Harrelson
  Commit : a3e4477c29d087d3708dbcb4dc5a90985c2b45e3
  Date   : Tue Dec 05 01:51:58 2017
  Subject: [PE] Turn on half-width tiles for all platforms and devices.

Bisect Details
  Configuration: android_webview_arm64_aosp_perf_bisect
  Benchmark    : system_health.memory_mobile
  Metric       : memory:webview:all_processes:reported_by_chrome:malloc:effective_size_avg/browse_news/browse_news_qq
  Change       : 1.69% | 33803741.3333 -> 34374874.6667

Revision             Result                  N
chromium@521550      33803741 +- 333013      6      good
chromium@521580      33866200 +- 369845      9      good
chromium@521584      33921658 +- 623353      9      good
chromium@521585      33917317 +- 349263      9      good
chromium@521586      34363355 +- 427228      6      bad       <--
chromium@521588      34336360 +- 325778      6      bad
chromium@521595      34486589 +- 542098      6      bad
chromium@521609      34374875 +- 622956      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.news.qq 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/8960949255255278416


For feedback, file a bug with component Speed>Bisection