All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=704333

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgzObLrgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgzKH5vwoM


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

win-zenbook

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8984381003146957424

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

Hi rockot@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 : rockot
  Commit : a9d566a1d6b27589589dcfeb81ad7694479df3a5
  Date   : Fri Mar 17 19:40:56 2017
  Subject: Mojo: Move waiting APIs to public library

Bisect Details
  Configuration: winx64_zen_perf_bisect
  Benchmark    : page_cycler_v2.intl_es_fr_pt-BR
  Metric       : timeToFirstContentfulPaint_avg/pcv1-cold/http___elmundo.es_
  Change       : 3.70% | 1389.09057142 -> 1440.44355556

Revision             Result                  N
chromium@457742      1389.09 +- 111.896      14      good
chromium@457808      1397.83 +- 41.6066      14      good
chromium@457841      1397.56 +- 41.8126      14      good
chromium@457850      1402.09 +- 40.8774      9       good
chromium@457854      1397.64 +- 19.002       6       good
chromium@457855      1399.73 +- 45.5089      9       good
chromium@457856      1430.26 +- 23.5708      6       bad       <--
chromium@457858      1434.17 +- 38.964       6       bad
chromium@457874      1440.44 +- 136.384      9       bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release_x64 --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=http...elmundo.es. page_cycler_v2.intl_es_fr_pt-BR

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8984381003146957424

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5824271026225152


| 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!

This seems like a very small regression and it's dubious that only a few benchmarks on a few bots would be affected if there were any real performance impact, given how widely used the code in question is.