All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=922577

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=eb6a1d86b44e3cd31ee98665c901a5ba620c8f80e3b7a01564a7fd108d0e8068


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

mac-10_12_laptop_low_end-perf

blink_perf.bindings - Benchmark documentation link:
  https://bit.ly/blink-perf-benchmarks

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/1486702c540000

📍 Found significant differences after each of 3 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/1486702c540000

[nojit] Refactor CallApiCallback calling convention by jgruber@chromium.org
https://chromium.googlesource.com/v8/v8/+/c6b0e12e4e664d82cdbbfddca273546b82f98f5d
dom-attribute-on-prototoype: 653.7 → 564.4 (-89.33)

[constant-tracking] Track constants by default. by jarin@chromium.org
https://chromium.googlesource.com/v8/v8/+/a6669bdce7bd3c241398be680eb5081bd6577c48
dom-attribute-on-prototoype: 563.8 → 580 (+16.19)

Update V8 to version 7.3.15. by v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com
https://chromium.googlesource.com/chromium/src/+/6cbccdb79ec6648c74bfe77fb0edb5a0faf2ec1d
dom-attribute-on-prototoype: 583.8 → 573.1 (-10.73)

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

Benchmark documentation link:
  https://bit.ly/blink-perf-benchmarks