All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=879335

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=9db50500703e9e4f636afbb0fbe4e142b451546a24404a734628bc5073ce8eb6


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

Win 7 Nvidia GPU Perf
Win 7 Perf
linux-perf
mac-10_12_laptop_low_end-perf
mac-10_13_laptop_high_end-perf

system_health.common_desktop - Benchmark documentation link:
  https://bit.ly/system-health-benchmarks

memory.desktop - Benchmark documentation link:
  None

loading.desktop - Benchmark documentation link:
  https://bit.ly/loading-benchmarks

system_health.memory_desktop - Benchmark documentation link:
  https://bit.ly/system-health-benchmarks

rendering.desktop - Benchmark documentation link:
  https://bit.ly/rendering-benchmarks

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/17523e39640000

😿 Pinpoint job stopped with an error.
https://pinpoint-dot-chromeperf.appspot.com/job/17523e39640000

Deadline exceeded while waiting for HTTP response from URL: https://chromium.googlesource.com/chromium/src/+log/5aa1c498531036ba21346882013742f08eb3128f..18593a3a29a6a2cb5ce172c61f288e54cd2691a5?format=JSON

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/157e8616e40000

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/158c6cd9e40000

📍 Found significant differences after each of 5 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/158c6cd9e40000

Rename IdleSpellCheckCallback to IdleSpellCheckController by xiaochengh@chromium.org
https://chromium.googlesource.com/chromium/src/+/223b5eef45dfe9db1fc3b96f8c6c9cf52925caa0
timeToFirstMeaningfulPaint: No values → 156.6

Filter browser process events in navigation slow-reports by etienneb@chromium.org
https://chromium.googlesource.com/chromium/src/+/327e1f374f22021537560548d8e6bac854b0b1aa
timeToFirstMeaningfulPaint: 156.6 → No values

[CI] Implement selection rects for display compositor pixel dumps by masonfreed@chromium.org
https://chromium.googlesource.com/chromium/src/+/75453eca5b9805945dde7a1e73d5f2c445027297
timeToFirstMeaningfulPaint: No values → 103.3

Revert "cc: Finish frame early if main thread is idle regardless of redraw state" by enne@chromium.org
https://chromium.googlesource.com/chromium/src/+/2e5401607fcfe8d434f2f91ae37a76222d9df322
timeToFirstMeaningfulPaint: 122.7 → 140 (+17.29)

Mac OOP-D: Enable OOP-D for Mac Waterfall by fsamuel@chromium.org
https://chromium.googlesource.com/chromium/src/+/00ec720decf72b496b1b5bd5bd16bcc85d04ec03
timeToFirstMeaningfulPaint: 100.7 → 417 (+316.4)

Understanding performance regressions:
  http://g.co/ChromePerformanceRegressions

Benchmark documentation link:
  https://bit.ly/loading-benchmarks

📍 Found significant differences after each of 2 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/157e8616e40000

Keep decorations when replacing loads in access-chain-convert. (#1829) by 31666470+s-perron@users.noreply.github.com
https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools/+/e065cc208f499f906301f92c6e9e51881b3943e9
memory:chrome:all_processes:reported_by_os:system_memory:private_footprint_size: No values → 1.321e+08

Mac OOP-D: Enable OOP-D for Mac Waterfall by fsamuel@chromium.org
https://chromium.googlesource.com/chromium/src/+/00ec720decf72b496b1b5bd5bd16bcc85d04ec03
memory:chrome:all_processes:reported_by_os:system_memory:private_footprint_size: 1.325e+08 → 1.447e+08 (+1.217e+07)

Understanding performance regressions:
  http://g.co/ChromePerformanceRegressions

Benchmark documentation link:
  None

It looks like the metrics have improved here.