All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=776371

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=59947fe37aa2d1382b696f5e8b6cdad58626c031fde15d898e5f12b4c20996dc


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

chromium-rel-mac12

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8965294682515771536

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

Suspected Commit
  Author : Stephen Chenney
  Commit : 8ff2371257ac4f24d77da4a62569840a53c49b47
  Date   : Thu Oct 12 13:11:52 2017
  Subject: Prevent squashing of border-radius layers

Bisect Details
  Configuration: mac_10_12_perf_bisect
  Benchmark    : system_health.memory_desktop
  Metric       : memory:chrome:all_processes:reported_by_chrome:cc:effective_size_avg/load_search/load_search_amazon
  Change       : 10.32% | 20428812.0 -> 22537992.0

Revision             Result                   N
chromium@508259      20428812 +- 114565       6      good
chromium@508303      20407061 +- 18918.6      6      good
chromium@508325      20404331 +- 14956.5      6      good
chromium@508328      20401600 +- 0.0          6      good
chromium@508329      22540175 +- 30938.1      6      bad       <--
chromium@508330      22535144 +- 3533.63      6      bad
chromium@508331      22718896 +- 439087       6      bad
chromium@508336      22544669 +- 34444.0      6      bad
chromium@508346      22537992 +- 9948.9       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=release --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=load.search.amazon system_health.memory_desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8965294682515771536


For feedback, file a bug with component Speed>Bisection