All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=780185

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=64d34afcd464530f50d5606172d3a4422d1ebbc896d1211392c1400c992c3a98


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

chromium-rel-win10
chromium-rel-win7-x64-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8964186556397363088

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

Suspected Commit
  Author : Leon Scroggins III
  Commit : 8bf6a886aad1c42210fd16f372097236db34c162
  Date   : Mon Oct 23 18:04:39 2017
  Subject: Reland "Stop building SkCodec"

Bisect Details
  Configuration: win_x64_perf_bisect
  Benchmark    : blink_perf.css
  Metric       : PseudoClassSelectors/PseudoClassSelectors
  Change       : 22.50% | 4933.5859231 -> 3823.73051086

Revision             Result                  N
chromium@510776      4933.59 +- 38.3447      6      good
chromium@510814      4740.18 +- 95.4853      6      good
chromium@510833      4459.39 +- 25.9469      6      good
chromium@510842      4324.1 +- 157.938       6      good
chromium@510845      4284.89 +- 125.51       6      good
chromium@510846      4390.55 +- 104.059      6      good
chromium@510847      3784.45 +- 65.8497      6      bad       <--
chromium@510851      3823.73 +- 25.0241      6      bad

Please refer to the following doc on diagnosing blink_perf regressions:
  https://chromium.googlesource.com/chromium/src/+/master/docs/speed/benchmark_harnesses/blink_perf.md

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 blink_perf.css

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8964186556397363088


For feedback, file a bug with component Speed>Bisection