All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=641087

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg3oPxpwkM


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

linux-release

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9003330638001451088

perf sheriff fixit: unsetting owners of bugs owned by sheriffs to clarify the sheriffing rotation triages the bugs.

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8999513271981633536

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


=== Bisection aborted ===
The bisect was aborted because The metric values for the initial "good" and "bad" revisions do not represent a clear regression.
Please contact the the team (see below) if you believe this is in error.

=== Warnings ===
The following warnings were raised by the bisect job:

 * Bisect failed to reproduce the regression with enough confidence.

===== TESTED REVISIONS =====
Revision         Mean     Std Dev   N   Good?
chromium@414050  19.1778  0.507074  18  good
chromium@414064  19.1222  0.496524  18  bad

Bisect job ran on: linux_perf_bisect
Bug ID: 641087

Test Command: src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --also-run-disabled-tests blink_perf.pywebsocket
Test Metric: XHR-send-blob-worker-async-verify/XHR-send-blob-worker-async-verify
Relative Change: 2.59%
Score: 0

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/linux_perf_bisect/builds/6755
Job details: https://chromeperf.appspot.com/buildbucket_job_status/8999513271981633536


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5907471808331776

| 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!

Bisect is unable to repro, possibly for the same reason that the benchmark is disabled on all platforms.