All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=727474

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDguqOVsAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgup3buwkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDguo-FsQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDguuaBpwkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg-pbnpgkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg-pT8rQsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDg-vKFtAsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDguvm9tAsM


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

android-nexus5X

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8978200304750424512

=== BISECT JOB RESULTS ===
Bisect failed for unknown reasons

Please contact the team (see below) and report the error.


Bisect Details
  Configuration: android_nexus5X_perf_bisect
  Benchmark    : system_health.common_mobile
  Metric       : timeToFirstMeaningfulPaint_avg/browse_media/browse_media_facebook_photos


To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=browse.media.facebook.photos system_health.common_mobile

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8978200304750424512

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5274624922746880


| 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!

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8978197202012563520

=== BISECT JOB RESULTS ===
Bisect failed for unknown reasons

Please contact the team (see below) and report the error.


Bisect Details
  Configuration: android_nexus5X_perf_bisect
  Benchmark    : system_health.common_mobile
  Metric       : timeToFirstMeaningfulPaint_avg/browse_media/browse_media_facebook_photos


To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=browse.media.facebook.photos system_health.common_mobile

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8978197202012563520

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5274624922746880


| 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!

Set Speed>Bisection label because of the "Bisect failed for unknown reasons".

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8976996827201587808

Some of these are false alerts where the ref moved at the same time.  A couple looked suspicious so I kicked off a bisect to find out what the culprit was. I they have recovered since so we can probably close this anyway.

=== BISECT JOB RESULTS ===
NO Perf regression found

Bisect Details
  Configuration: android_nexus5X_perf_bisect
  Benchmark    : system_health.common_mobile
  Metric       : timeToFirstMeaningfulPaint_avg/browse_media/browse_media_facebook_photos

Revision             Result                  N
chromium@473800      511.92 +- 190.749       21      good
chromium@473900      529.306 +- 199.601      21      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=browse.media.facebook.photos system_health.common_mobile

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8976996827201587808

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5249830512754688


| 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!

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8976974143320595504

=== BISECT JOB RESULTS ===
Bisect was unable to run to completion

Error: INFRA_FAILURE

The bisect was able to narrow the range, you can try running with:
  good_revision: 353a96e9ef4fe92c8808aac4acec49b2a7527109
  bad_revision : 0e2a2278827bd1ef68423438211030a22b60e331

If failures persist contact the team (see below) and report the error.


Bisect Details
  Configuration: android_nexus5X_perf_bisect
  Benchmark    : system_health.common_mobile
  Metric       : timeToFirstMeaningfulPaint_avg/browse_media/browse_media_facebook_photos

Revision             Result                  N
chromium@473800      430.67 +- 14.042        9       good
chromium@473850      429.993 +- 15.3587      14      good
chromium@473863      423.57 +- 16.9085       6       good
chromium@473869      427.54 +- 13.7929       6       good
chromium@473872      427.553 +- 17.6892      6       good
chromium@473874      440.172 +- 8.48714      6       bad
chromium@473875      443.414 +- 13.0913      6       bad
chromium@473900      441.736 +- 34.9535      9       bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=browse.media.facebook.photos system_health.common_mobile

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8976974143320595504

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5249830512754688


| 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!

Some of these, the ref build is moving too, and they're invalid. For the regression in #11, it recovered a few revisions later.