All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=760163

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=8d45d58ec94c3777826272d15b00a006a6957d81e619eb23fb7ad74c591e0b31


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

chromium-rel-win7-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8969912336097196624

=== Auto-CCing suspected CL author mlippautz@chromium.org ===

Hi mlippautz@chromium.org, the bisect results pointed to your CL, please take a look at the
results.


=== BISECT JOB RESULTS ===
Perf regression found with culprit

Suspected Commit
  Author : Michael Lippautz
  Commit : ac528b27b356ecddcf4c400c7de996eefd7f8e38
  Date   : Sat Aug 19 10:43:55 2017
  Subject: [wrapper-tracing] Enable use of mixins for values

Bisect Details
  Configuration: win_perf_bisect
  Benchmark    : blink_perf.bindings
  Metric       : insert-before/insert-before
  Change       : 2.67% | 44.0169030707 -> 42.8422651974

Revision             Result                   N
chromium@495808      44.0169 +- 4.49456       21      good
chromium@495809      43.997 +- 1.5291         6       good
chromium@495810      42.8049 +- 1.13663       9       bad       <--
chromium@495812      42.6595 +- 0.696422      9       bad
chromium@495816      42.8423 +- 0.706132      14      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests blink_perf.bindings

More information on addressing performance regressions:
  http://g.co/ChromePerformanceRegressions

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8969912336097196624


For feedback, file a bug with component Speed>Bisection

mlippautz: any update on this bug?

Thanks for pinging!

A small regression like this one is expected for this commit. The CL improves general infrastructure by generalizing the approach a bit.

Thanks for the explanation. cc-ing test owner jbroman as FYI.