All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=788339

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=484f85a69d9d09aab8113f609ff1e83d3b57947d89c38a80f0484fef80dc1970


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

chromium-rel-win7-x64-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8962047864441537248

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

Suspected Commit
  Author : Fredrik Söderquist
  Commit : e9bd34c60d38b0b5bcee52a6cd475b9124974aab
  Date   : Tue Nov 21 21:09:18 2017
  Subject: Use approximate stroke bounding boxes for SVG shapes

Bisect Details
  Configuration: win_x64_perf_bisect
  Benchmark    : blink_perf.svg
  Metric       : SvgHitTesting/SvgHitTesting
  Change       : 10.13% | 87.8858333333 -> 96.789

Revision             Result                  N
chromium@518389      87.8858 +- 1.91315      6      good
chromium@518391      86.6073 +- 2.7477       6      good
chromium@518392      99.8057 +- 1.1035       6      bad       <--
chromium@518393      99.744 +- 3.81055       6      bad
chromium@518396      96.4788 +- 2.54472      6      bad
chromium@518403      99.2183 +- 2.62333      6      bad
chromium@518416      97.722 +- 1.76717       6      bad
chromium@518443      94.7453 +- 2.91345      6      bad
chromium@518496      96.789 +- 1.64227       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.svg

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8962047864441537248


For feedback, file a bug with component Speed>Bisection