All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=808036

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=e4ae3fd37d557efad866a5ece8ff4ca8f6034eadb74256dbb266d8578431431f


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

android-nexus5X

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/16f37006840000

📍 Found a significant difference after 1 commit.
https://pinpoint-dot-chromeperf.appspot.com/job/16f37006840000

Enable SpeculativePreconnect Field Trial Testing
By alexilin@chromium.org · Wed Jan 31 09:21:06 2018
chromium @ 8442e044284223377ccd75e4f1b519c5656d4d8d

Understanding performance regressions:
  http://g.co/ChromePerformanceRegressions

 Issue 808090  has been merged into this issue.

 Issue 808657  has been merged into this issue.

 Issue 808654  has been merged into this issue.

 Issue 808655  has been merged into this issue.

 Issue 808658  has been merged into this issue.

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/11b3d361840000

📍 Couldn't reproduce a difference.
https://pinpoint-dot-chromeperf.appspot.com/job/11b3d361840000

Issue 808669 has been merged into this issue.

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/14b46de1840000

📍 Couldn't reproduce a difference.
https://pinpoint-dot-chromeperf.appspot.com/job/14b46de1840000

 Issue 808659  has been merged into this issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/48e8746b747754f10a3494523b07f0a492ec659d

commit 48e8746b747754f10a3494523b07f0a492ec659d
Author: Alexandr Ilin <alexilin@chromium.org>
Date: Wed Mar 07 16:19:24 2018

predictors: Allow port in urls.

This CL enables predictions for URLs that have non-standard port. This
is done because some performance tests that use URLs with a custom port
number show regression when the predictor is enabled. Now we're trying
to confirm that this is the case.

This restriction was overly cautious to begin with to make sure we don't
put garbage in the database. In the future we can prohibit such URLs to
be written in the database but allow preconnecting to them.

Bug:  808036 
Change-Id: I2a41795cb584db2ed164fc6b62c31a90d5ecb483
Reviewed-on: https://chromium-review.googlesource.com/939381
Reviewed-by: Charlie Harrison <csharrison@chromium.org>
Reviewed-by: Benoit L <lizeb@chromium.org>
Commit-Queue: Alexandr Ilin <alexilin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#541452}
[modify] https://crrev.com/48e8746b747754f10a3494523b07f0a492ec659d/chrome/browser/page_load_metrics/page_load_metrics_browsertest.cc
[modify] https://crrev.com/48e8746b747754f10a3494523b07f0a492ec659d/chrome/browser/predictors/loading_data_collector.cc
[modify] https://crrev.com/48e8746b747754f10a3494523b07f0a492ec659d/chrome/browser/predictors/loading_data_collector_unittest.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b6e03254a007461585b9b484e620893630f127a8

commit b6e03254a007461585b9b484e620893630f127a8
Author: Alexandr Ilin <alexilin@chromium.org>
Date: Thu Mar 15 16:49:47 2018

predictors: Skip dns preresolution if a proxy is configured

The PreconnectManager issues preconnect requests only after it
preresolves a host name. If a fixed proxy configuration is in place,
there is no need to make a DNS request.

Bug:  808036 
Change-Id: I15f6baf6405386fd6bd8154b2691c5b858c6e04b
Reviewed-on: https://chromium-review.googlesource.com/958913
Reviewed-by: Benoit L <lizeb@chromium.org>
Commit-Queue: Alexandr Ilin <alexilin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543402}
[modify] https://crrev.com/b6e03254a007461585b9b484e620893630f127a8/chrome/browser/predictors/preconnect_manager.cc
[modify] https://crrev.com/b6e03254a007461585b9b484e620893630f127a8/chrome/browser/predictors/preconnect_manager.h
[modify] https://crrev.com/b6e03254a007461585b9b484e620893630f127a8/chrome/browser/predictors/preconnect_manager_unittest.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b43af5ce575eb6c9b964c7fc58068a22c3420609

commit b43af5ce575eb6c9b964c7fc58068a22c3420609
Author: Alexandr Ilin <alexilin@chromium.org>
Date: Thu Mar 29 20:43:10 2018

predictors: Delay predictors database write to disk

The predictors database is cached in memory and can be flushed on disk
only periodically. This CL adds a delay before updating the predictors
database on disk.

Bug:  808036 
Change-Id: I29a1376c131fa33cd946ffceb7e0480c3d38093b
Reviewed-on: https://chromium-review.googlesource.com/980876
Commit-Queue: Alexandr Ilin <alexilin@chromium.org>
Reviewed-by: Egor Pasko <pasko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#546940}
[modify] https://crrev.com/b43af5ce575eb6c9b964c7fc58068a22c3420609/chrome/browser/predictors/glowplug_key_value_data.h
[modify] https://crrev.com/b43af5ce575eb6c9b964c7fc58068a22c3420609/chrome/browser/predictors/loading_predictor_config.cc
[modify] https://crrev.com/b43af5ce575eb6c9b964c7fc58068a22c3420609/chrome/browser/predictors/loading_predictor_config.h
[modify] https://crrev.com/b43af5ce575eb6c9b964c7fc58068a22c3420609/chrome/browser/predictors/loading_test_util.cc
[modify] https://crrev.com/b43af5ce575eb6c9b964c7fc58068a22c3420609/chrome/browser/predictors/resource_prefetch_predictor.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2aa00c589eaca198921047b055aefd88b22106c3

commit 2aa00c589eaca198921047b055aefd88b22106c3
Author: Alexandr Ilin <alexilin@chromium.org>
Date: Thu Apr 26 08:39:43 2018

Disable SpeculativePreconnectValidation field trial

This CL temporarily disables the SpeculativePreconnectValidation field
trial in order to assess its impact on the perf dashboard. This feature
is planned to be turned on by default after the performance evaluation.

Bug:  808036 
Change-Id: I69de5a26eba86b8e4cad11c4cf534c3d13e73894
Reviewed-on: https://chromium-review.googlesource.com/1028052
Reviewed-by: Jesse Doherty <jwd@chromium.org>
Commit-Queue: Alexandr Ilin <alexilin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#553955}
[modify] https://crrev.com/2aa00c589eaca198921047b055aefd88b22106c3/testing/variations/fieldtrial_testing_config.json

The field trial was disabled so I' marking this as obsolete.