All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=781956

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=e0b318d75ac60fe8ff3ee799811878e2b688d730e4272beca9f4efaf62b0820c


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

chromium-rel-mac11

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8963639921693663472

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

Suspected Commit
  Author : Sunny Sachanandani
  Commit : d2e9756d46f6a324a1e98d3553eb045556a5f4af
  Date   : Mon Oct 30 20:45:44 2017
  Subject: cc: Use CHROMIUM_texture_storage_image for GMB backed texture resources.

Bisect Details
  Configuration: mac_10_11_perf_bisect
  Benchmark    : smoothness.tough_animation_cases
  Metric       : frame_times/compositor_heavy_animation.html?N_0200
  Change       : 99.21% | 25.4866563414 -> 50.7707928345

Revision             Result                   N
chromium@512569      25.4867 +- 0.636097      6      good
chromium@512600      25.2287 +- 0.838024      6      good
chromium@512608      25.249 +- 0.82531        6      good
chromium@512612      25.2871 +- 0.992616      6      good
chromium@512614      25.4965 +- 0.453012      6      good
chromium@512615      50.4123 +- 3.16044       6      bad       <--
chromium@512630      50.771 +- 0.766621       6      bad
chromium@512691      50.7708 +- 1.95758       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=compositor.heavy.animation.html.N.0200 smoothness.tough_animation_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963639921693663472


For feedback, file a bug with component Speed>Bisection