All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=913450

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=61e17a6de351f7473c4956e0537caf24c496b9bf2672b24f763fd01f5c5a1762


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

Win 7 Perf
android-nexus5x-perf

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

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

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/12eaf96c140000

📍 Couldn't reproduce a difference.
https://pinpoint-dot-chromeperf.appspot.com/job/12eaf96c140000

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/119922b6140000

📍 Found significant differences after each of 2 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/119922b6140000

Do not pretenure descriptor arrays. by ulan@chromium.org
https://chromium.googlesource.com/v8/v8/+/92e228534a472c5ff55f7ed536f5c6ba7daccedb
memory:chrome:all_processes:reported_by_chrome:v8:allocated_objects_size: 5.967e+06 → 6.181e+06 (+2.139e+05)

[esnext] stage Object.fromEntries() by caitp@igalia.com
https://chromium.googlesource.com/v8/v8/+/7de6d2c196ffbfeb800ea9870b88a283d2ac0735
memory:chrome:all_processes:reported_by_chrome:v8:allocated_objects_size: 6.181e+06 → 6.105e+06 (-7.578e+04)

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

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