All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=820000

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=3833f40bb72f79790219228ec27b423d5f7cdfdd4e8b247f2c75143f652ebe30


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

android-nexus5
android-nexus5X
android-one
android-webview-nexus5X
chromium-rel-mac11-air
chromium-rel-mac11-pro
chromium-rel-mac12
linux-release

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/14ad0c3a440000

📍 Found significant differences after each of 4 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/14ad0c3a440000

[builtins] Refactor the StringConstructor builtin by mathias@chromium.org
https://chromium.googlesource.com/v8/v8/+/15e207b300bf7f7b70df83e98cbaf8c0d99a7485

[runtime] Move validity cell from PrototypeInfo to Map. by ishell@chromium.org
https://chromium.googlesource.com/v8/v8/+/40a3e6dcb9bdb5cb2a7f6e29fa8e4de75e538ef6

[runtime] Always store the name in a function's ScopeInfo by cbruni@chromium.org
https://chromium.googlesource.com/v8/v8/+/01488b9c4f1b4c8e2b66494b24d7e7ff8a826860

[ic] Introduce new IC for storing into array literals. by neis@chromium.org
https://chromium.googlesource.com/v8/v8/+/2e2860f74f9c610d5ffb3ee1778d937055d25dea

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

The largest/ probably only regression worth looking into is 
[runtime] Move validity cell from PrototypeInfo to Map. by ishell@chromium.org

so assigning to ishell@, I think you are already tracking this somewhere else so probably can just close as duplicate.

Issue 820014 has been merged into this issue.

 Issue 820417  has been merged into this issue.