All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=646819

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgmeHHvQkM


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

chromium-rel-mac10

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9001541325958937152

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

Hi ulan@chromium.org, the bisect results pointed to your CL below as possibly
causing a regression. Please have a look at this info and see whether
your CL be related.


===== BISECT JOB RESULTS =====
Status: completed


===== SUSPECTED CL(s) =====
Subject : [heap] Decouple old generation allocation limit from external memory.
Author  : ulan
Commit description:
  
We check for external memory limit in Heap::ReportExternalMemoryPressure.

BUG= chromium:616434 

Review-Url: https://codereview.chromium.org/2329993002
Cr-Commit-Position: refs/heads/master@{#39374}
Commit  : 672d079ccba686019fa1457c83b42c2e692ef88b
Date    : Tue Sep 13 08:54:10 2016


===== TESTED REVISIONS =====
Revision                       Mean    Std Dev  N  Good?
chromium@418219                557711  48.1996  5  good
chromium@418236                560527  6894.77  5  good
chromium@418241                557474  157.419  5  good
chromium@418242                557570  360.961  5  good
chromium@418242,v8@672d079ccb  654590  27450.4  5  bad    <--
chromium@418242,v8@28bd118148  654115  28550.1  5  bad
chromium@418242,v8@2ab3fcf42f  656350  26338.9  5  bad
chromium@418243                642851  2170.41  5  bad
chromium@418245                653640  28171.0  5  bad
chromium@418253                657336  25737.3  5  bad

Bisect job ran on: mac_10_10_perf_bisect
Bug ID: 646819

Test Command: src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --also-run-disabled-tests oortonline_tbmv2
Test Metric: memory:chrome:renderer_processes:reported_by_chrome:v8:heap:map_space:effective_size_avg/memory:chrome:renderer_processes:reported_by_chrome:v8:heap:map_space:effective_size_avg
Relative Change: 17.86%
Score: 99.8

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/mac_10_10_perf_bisect/builds/2368
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9001541325958937152


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5897693719691264

| O O | Visit http://www.chromium.org/developers/speed-infra/perf-bug-faq
|  X  | for more information addressing perf regression bugs. For feedback,
| / \ | file a bug with component Tests>AutoBisect.  Thank you!