All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=755085

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=8410d00818f11b7557c35b1a95ff935f857fad5c6274c411daf367524f516197


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

chromium-rel-mac-retina
chromium-rel-mac11
chromium-rel-mac11-pro
chromium-rel-win7-gpu-ati
chromium-rel-win7-gpu-intel
chromium-rel-win7-gpu-nvidia
chromium-rel-win8-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8971300111898721328

=== BISECT JOB RESULTS ===
Bisect was unable to run to completion

Error: INFRA_FAILURE

The bisect was able to narrow the range, you can try running with:
  good_revision: af46af9f93aad007a4bd053612733592ea781981
  bad_revision : f0c3c780c8297209abc2a7e8f9b2efb63d064436

If failures persist contact the team (see below) and report the error.


Bisect Details
  Configuration: win_8_perf_bisect
  Benchmark    : v8.runtimestats.browsing_desktop
  Metric       : v8-gc-incremental-step_max/browse_social/browse_social_twitter

Revision             Result                    N
chromium@493054      1.69083 +- 0.462077       6      good
chromium@493288      1.69867 +- 0.242754       6      good
chromium@493345      1.67117 +- 0.258079       6      good
chromium@493359      1.72733 +- 0.334155       6      good
chromium@493366      1.6065 +- 0.166978        6      good
chromium@493373      1.27283 +- 0.33817        6      bad
chromium@493401      1.33067 +- 0.287175       6      bad
chromium@493513      1.23789 +- 0.275163       9      bad
chromium@493971      1.18367 +- 0.0853776      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=browse.social.twitter 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/8971300111898721328


For feedback, file a bug with component Speed>Bisection

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8971114428048155936