All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=783766

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=287e74e763d3e5b8ca2d79342526c79719712cc32522f2e056051a194372ec59


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

chromium-rel-win10
chromium-rel-win7-gpu-ati
chromium-rel-win7-x64-dual
chromium-rel-win8-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963304490962395344

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

Suspected Commit
  Author : Kouhei Ueno
  Commit : e1cfaee91ad08478fbd956fcd73d570032702397
  Date   : Thu Nov 09 08:23:01 2017
  Subject: Revert "Make script cache hits async"

Bisect Details
  Configuration: win_8_perf_bisect
  Benchmark    : loading.desktop
  Metric       : cpuTimeToFirstMeaningfulPaint_avg/warm/AllRecipes
  Change       : 290.50% | 231.519166667 -> 904.086166667

Revision             Result                  N
chromium@515078      231.519 +- 6.93318      6      good
chromium@515102      232.461 +- 7.42741      6      good
chromium@515114      230.018 +- 12.9988      6      good
chromium@515120      233.794 +- 10.8902      6      good
chromium@515121      910.918 +- 91.9595      6      bad       <--
chromium@515122      906.759 +- 96.7346      6      bad
chromium@515123      921.258 +- 80.9512      6      bad
chromium@515125      904.086 +- 113.238      6      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 --story-filter=AllRecipes loading.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963304490962395344


For feedback, file a bug with component Speed>Bisection