Performance and stability improvements on all platforms.

TBR=v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com

Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
Change-Id: I77af5a109b78c5c0d29c3f9bc92cb8b381e3f4d6
Reviewed-on: https://chromium-review.googlesource.com/1130099
Reviewed-by: V8 Autoroller <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/6.9.330@{#1}
Cr-Branched-From: 3ba5445b8a0e31a0f45d9268286216da0c8dfe89-refs/heads/master@{#54336}