All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=633125

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgxtfwoQoM


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

chromium-rel-mac-retina

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9005542043988342720

===== BISECT JOB RESULTS =====
Status: failed


===== TESTED REVISIONS =====
Revision         Mean    Std Dev   N  Good?
chromium@407924  26.8    0.339116  5  good
chromium@407967  27.475  0.37321   8  bad

Bisect job ran on: mac_retina_perf_bisect
Bug ID: 633125

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-sync-verify/XHR-send-blob-worker-sync-verify
Relative Change: 2.76%
Score: 0

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/mac_retina_perf_bisect/builds/1489
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9005542043988342720


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5838993959157760

| 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!

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9005310959338569344

===== BISECT JOB RESULTS =====
Status: failed


===== TESTED REVISIONS =====
Revision         Mean    Std Dev   N  Good?
chromium@407924  26.8    0.339116  5  good
chromium@407967  27.475  0.37321   8  bad

Bisect job ran on: mac_retina_perf_bisect
Bug ID: 633125

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-sync-verify/XHR-send-blob-worker-sync-verify
Relative Change: 2.76%
Score: 0

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/mac_retina_perf_bisect/builds/1489
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9005542043988342720


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5838993959157760

| 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!

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9005219770182492272

Perf sheriff ping: reminder to follow up on possible performance issues

Perf sheriff fixit: unsetting owners where reporter==owner, to clarify the current member of the rotation is responsible for triage.

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8996420191881602512

This is only mac retina, but is real. I just kicked off a bisect with a wider CL range. I have a feeling if this fails we should just won't fix this.

===== 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@407910  27.6111  0.377124  18  good
chromium@407975  27.6     0.362994  18  bad

Bisect job ran on: mac_retina_perf_bisect
Bug ID: 633125

Test Command: src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests blink_perf.pywebsocket
Test Metric: XHR-send-blob-worker-sync-verify/XHR-send-blob-worker-sync-verify
Relative Change: 0.66%
Score: 0

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/mac_retina_perf_bisect/builds/1811
Job details: https://chromeperf.appspot.com/buildbucket_job_status/8996420191881602512


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5802010224361472

| 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!

These regressions happened before M56 branch. M56 is now in stable. These regressions made it to the stable channel. Marking wontfix.