All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=842780

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=3030915a449d6f4d73fd4c75baf1d209212199b4bec9935bedae5d0afd435a30


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

perf-go-phone-1024

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8946531282799542416

=== BISECT JOB RESULTS ===
Perf regression found but unable to narrow commit range

Build failures prevented the bisect from narrowing the range further.


Bisect Details
  Configuration: go-phone-1024-perf-bisect
  Benchmark    : memory.top_10_mobile
  Metric       : memory:chrome:all_processes:reported_by_os:system_memory:private_dirty_size_avg/background/after_http_www_baidu_com_s_word_google
  Change       : 1.52% | 26176641.7143 -> 26575416.5714

Suspected Commit Range
  2 commits in range
  https://chromium.googlesource.com/v8/v8/+log/2793d72cd73f55e9c699aa865445ad2a4f107309..e0c3f6d6ca005185e537fb85bbe841fe5dae5240


Revision                                                     Result                   N
android-chrome@be902aa047                                    26176642 +- 302736       21       good
android-chrome@be902aa047,chromium@556849                    26269094 +- 217527       14       good
android-chrome@be902aa047,chromium@556890                    26209670 +- 101055       9        good
android-chrome@be902aa047,chromium@556893                    26104994 +- 184624       9        good
android-chrome@be902aa047,chromium@556894                    26123394 +- 365943       14       good
android-chrome@be902aa047,chromium@556894,v8@225d5ed190      26272313 +- 182186       14       good
android-chrome@be902aa047,chromium@556894,v8@fe91e0bd69      26181908 +- 76453.8      6        good
android-chrome@be902aa047,chromium@556894,v8@2793d72cd7      26032404 +- 250208       6        good
android-chrome@be902aa047,chromium@556894,v8@855850eb7f      ---                      ---      build failure
android-chrome@be902aa047,chromium@556894,v8@e0c3f6d6ca      26515147 +- 183675       14       bad
android-chrome@be902aa047,chromium@556895                    26661433 +- 212637       14       bad
android-chrome@be902aa047,chromium@556901                    26667967 +- 235093       6        bad
android-chrome@be902aa047,chromium@556911                    26591963 +- 366148       9        bad
android-chrome@1390428f76                                    26575417 +- 208128       14       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-chrome --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=http.www.baidu.com.s.word.google memory.top_10_mobile

More information on addressing performance regressions:
  http://g.co/ChromePerformanceRegressions

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8946531282799542416


For feedback, file a bug with component Speed>Bisection

Downgrading P2 issues unmodified for more than 6 months, which have no owner or component.