All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=866498

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=75de684362b55f6c9b29f14d8151cf8f4d61736f7c6c499da2dbea5b15facfac


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

health-plan-clankium-low-end-phone
health-plan-clankium-phone
health-plan-webview-low-end-phone
health-plan-webview-phone
perf-go-phone-1024
perf-go-phone-512
perf-go-webview-phone
perf-monochrome-n-phone

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8940199008820084528

=== Auto-CCing suspected CL author enne@chromium.org ===

Hi enne@chromium.org, the bisect results pointed to your CL, please take a look at the
results.


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

Suspected Commit
  Author : Adrienne Walker
  Commit : f973fceec6e8eec76f90fa30d33a9a3c13aebf24
  Date   : Wed Jul 18 20:08:24 2018
  Subject: Free fewer resources when idle in oop raster

Bisect Details
  Configuration: webview-phone-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       : 12.91% | 30978939.6667 -> 34979537.0

Revision                                       Result                   N
android-chrome@cd22f0f943                      30978940 +- 178719       6      good
android-chrome@cd22f0f943,chromium@576157      30932709 +- 96244.5      6      good
android-chrome@cd22f0f943,chromium@576174      31065166 +- 140944       6      good
android-chrome@cd22f0f943,chromium@576178      30932256 +- 114159       6      good
android-chrome@cd22f0f943,chromium@576179      30838221 +- 281486       6      good
android-chrome@cd22f0f943,chromium@576180      34977368 +- 169805       6      bad       <--
android-chrome@cd22f0f943,chromium@576182      35070415 +- 187316       6      bad
android-chrome@cd22f0f943,chromium@576190      35273286 +- 129322       6      bad
android-chrome@c0e3d62ff2                      34979537 +- 210152       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/8940199008820084528


For feedback, file a bug with component Speed>Bisection