All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=778161

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=d8ae47b7971a2a0d8c7c572a9da48f131021cace45611998180cc9b09815ab7e


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

chromium-rel-mac-retina

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8964771414381893712

=== BISECT JOB RESULTS ===
Perf regression found but unable to narrow commit range

Build failures prevented the bisect from narrowing the range further.


Bisect Details
  Configuration: mac_retina_perf_bisect
  Benchmark    : rasterize_and_record_micro.top_25
  Metric       : record_time/file___static_top_25_cnn.html
  Change       : 5.49% | 0.114428571429 -> 0.120714285714

Suspected Commit Range
  3 commits in range
  https://chromium.googlesource.com/chromium/src/+log/82b029bc0d2be29bcb95e79b5d11ebbbf6d820cc..0ea3f4d679db5d23b0338287ad96787a9f76e970


Revision             Result                      N
chromium@510776      0.114429 +- 0.00592814      21       good
chromium@510785      0.114857 +- 0.00526444      14       good
chromium@510792      0.114214 +- 0.0049353       14       good
chromium@510794      0.114357 +- 0.0030355       14       good
chromium@510795      ---                         ---      build failure
chromium@510796      ---                         ---      build failure
chromium@510797      0.115714 +- 0.0038545       14       bad
chromium@510817      0.1155 +- 0.00308221        14       bad
chromium@510857      0.120714 +- 0.0284404       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 --story-filter=file...static.top.25.cnn.html rasterize_and_record_micro.top_25

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8964771414381893712


For feedback, file a bug with component Speed>Bisection

This only occurred on one platform and mostly recovered.