All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=827971

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=4da1cbeafa37eaee04e9e8d6609de51dc9a922d4eda7c6e4d01ea2fd45683136


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

android-nexus5
android-nexus5X
android-webview-nexus5X
android-webview-nexus6
linux-release
win-high-dpi

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/1294993f440000

📍 Found significant differences after each of 2 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/1294993f440000

Add deps for ui/file_manager/file_manager/test:create_test_main. by joelhockey@chromium.org
https://chromium.googlesource.com/chromium/src/+/7d5277c33bb3d019267dae02294fd7995c981201

Revert "Remove separator from rounded omnibox results" by pbos@chromium.org
https://chromium.googlesource.com/chromium/src/+/69dba8579e293f519384ec12685a628033f9a83d

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

I don't see either of these as related. joelhockey@ touches a test-only target and my change is not compiled into Android and the flag that enables the code isn't on by default on desktop either.

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/14e542e0c40000

📍 Found significant differences after each of 2 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/14e542e0c40000

[FSP] Do not get watchers for unwatchable file systems by allenvic@chromium.org
https://chromium.googlesource.com/chromium/src/+/67af16ed4b5c8dcca09f8b6dd0d892c4e9e57c93

Update V8 to version 6.7.194. by v8-autoroll@chromium.org
https://chromium.googlesource.com/chromium/src/+/cebfc209d737ca36c02775eb86f306cbe556ae69

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

Seems pin-point is having issues identifying the culprit.  There is a row of crashed builds to https://pinpoint-dot-chromeperf.appspot.com/job/14e542e0c40000, 8 CL in all, [FSP] Do not get watchers for unwatchable file systems" is the first that happens to build, and is blamed.

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/14dbfcb0c40000

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/12fc8288c40000

📍 Found significant differences after each of 2 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/12fc8288c40000

Ship BigInts by jkummerow@chromium.org
https://chromium.googlesource.com/v8/v8/+/16aecc5d9b091486994b1a4aa756294e5c535ee3

Update V8 to version 6.7.194. by v8-autoroll@chromium.org
https://chromium.googlesource.com/chromium/src/+/cebfc209d737ca36c02775eb86f306cbe556ae69

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

Shot in the dark, but jgruber, would b2f0d8617b9bb8aa463f6d8b7f8ca99b6ab285de disabling embedded built-ins explain a 4% increase in memory usage?

Assigning to you because I think the autoroller is probably a terrible assignee? Feel free to unassign (if you can't triage) and kick off another bisect job unless someone else steps up.

📍 Found significant differences after each of 2 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/14dbfcb0c40000

Ship BigInts by jkummerow@chromium.org
https://chromium.googlesource.com/v8/v8/+/16aecc5d9b091486994b1a4aa756294e5c535ee3

Update V8 to version 6.7.194. by v8-autoroll@chromium.org
https://chromium.googlesource.com/chromium/src/+/cebfc209d737ca36c02775eb86f306cbe556ae69

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

Yep, this looks like my embedded builtins revert, which will hopefully be relanded permanently after the branch cut. Thanks for triaging!