All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=784267

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=d9191ae77c91fea3bc5002eae386943552599615a776a4c37df28bd6ed6f82b6


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

chromium-rel-mac11
chromium-rel-mac11-air
chromium-rel-mac11-pro
chromium-rel-mac12
chromium-rel-win10
chromium-rel-win7-dual
chromium-rel-win7-gpu-ati
chromium-rel-win7-gpu-intel
chromium-rel-win7-gpu-nvidia
chromium-rel-win7-x64-dual
chromium-rel-win8-dual
win-high-dpi

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963058966556508048

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

Suspected Commit
  Author : Nate Chapin
  Commit : 1aec1a92fb786cae0a24ff2b22d4858d4486252e
  Date   : Mon Nov 06 23:47:59 2017
  Subject: Make script cache hits async

Bisect Details
  Configuration: winx64_10_perf_bisect
  Benchmark    : v8.runtimestats.browsing_desktop
  Metric       : Parse-Background:duration_avg/browse_tech/browse_tech_discourse_infinite_scroll
  Change       : 183.48% | 49.549 -> 140.463

Revision             Result                  N
chromium@514278      49.549 +- 88.6168       6      good
chromium@514290      49.4182 +- 92.4746      6      good
chromium@514296      48.068 +- 83.3223       6      good
chromium@514298      47.2795 +- 76.5153      6      good
chromium@514299      138.004 +- 3.36438      6      bad       <--
chromium@514302      138.95 +- 6.30342       6      bad
chromium@514326      137.693 +- 5.2425       6      bad
chromium@514374      140.463 +- 4.57714      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release_x64 --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=browse.tech.discourse.infinite.scroll v8.runtimestats.browsing_desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963058966556508048


For feedback, file a bug with component Speed>Bisection