All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=754688

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=9302347a2ba1e61b6e93d5e6baca7bfb157c654b3b6f6cc543f14d535857ae14


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

chromium-rel-mac-retina
chromium-rel-mac11
chromium-rel-mac11-air
chromium-rel-mac11-pro
chromium-rel-win10
chromium-rel-win7-gpu-ati
chromium-rel-win7-gpu-intel
chromium-rel-win7-gpu-nvidia

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8971552911762181968

=== Auto-CCing suspected CL author rune@opera.com ===

Hi rune@opera.com, the bisect results pointed to your CL, please take a look at the
results.


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

Suspected Commit
  Author : Rune Lillesveen
  Commit : c3d15c145666e6b393ffdbdbdb9727285e6aecae
  Date   : Wed Aug 09 08:07:08 2017
  Subject: No need for recalc on viewport propagation.

Bisect Details
  Configuration: winx64intel_perf_bisect
  Benchmark    : loading.desktop
  Metric       : cpuTimeToFirstMeaningfulPaint_avg/pcv1-warm/FarsNews
  Change       : 37.32% | 149.206333333 -> 204.896666667

Revision             Result                  N
chromium@492796      149.206 +- 5.90884      6      good
chromium@492854      150.019 +- 6.62711      6      good
chromium@492883      152.142 +- 8.01321      6      good
chromium@492887      150.664 +- 6.91571      6      good
chromium@492888      148.886 +- 2.02226      6      good
chromium@492889      202.811 +- 7.30655      6      bad       <--
chromium@492890      198.319 +- 4.89891      6      bad
chromium@492897      203.857 +- 12.2469      6      bad
chromium@492911      204.897 +- 6.95232      6      bad

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 --story-filter=FarsNews loading.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8971552911762181968


For feedback, file a bug with component Speed>Bisection

The graphs went back down. Some of them slightly above previous levels, but there were some other regressions and recoveries after this one as well, so hard to say. Closing.