All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=731512

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglrS-_QoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5tv9lwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5r6k5AgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5svekAgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglrT09QsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglsy8sgkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5s_-ywsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5sug9goM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglojZpgsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5r6kpAsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5vupogkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgluyItQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgloGDpwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgloye5QgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5rekxAsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5ve6-gkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5pGmtwsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDglvCNrAsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg5vmNvAkM


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

chromium-rel-mac-retina
chromium-rel-mac11
chromium-rel-mac11-pro
chromium-rel-mac12
chromium-rel-mac12-mini-8gb

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8977297627569153088

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

Suspected Commit
  Author : mek
  Commit : c8e2b27f71c6792fa1072fa98a22c111ad229090
  Date   : Tue Jun 06 23:18:28 2017
  Subject: Switch to mojo localstorage backend by default.

Bisect Details
  Configuration: mac_pro_perf_bisect
  Benchmark    : page_cycler_v2_site_isolation.basic_oopif
  Metric       : timeToFirstContentfulPaint_avg/pcv1-cold/http___www.nationalgeographic.com_
  Change       : 47.56% | 352.400833331 -> 519.990200001

Revision             Result                  N
chromium@477361      352.401 +- 131.226      6      good
chromium@477425      353.596 +- 73.822       6      good
chromium@477457      358.373 +- 136.439      6      good
chromium@477458      528.716 +- 83.819       6      bad       <--
chromium@477459      531.623 +- 82.0814      5      bad
chromium@477461      533.922 +- 85.3793      6      bad
chromium@477465      535.631 +- 87.6123      6      bad
chromium@477473      526.478 +- 81.4         5      bad
chromium@477488      519.99 +- 79.1918       5      bad

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=http...www.nationalgeographic.com. page_cycler_v2_site_isolation.basic_oopif

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8977297627569153088

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=4944578999746560


| 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 Speed>Bisection.  Thank you!