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: I02b46733755577df9536556a65468df36145ae10
Reviewed-on: https://chromium-review.googlesource.com/1128805
Reviewed-by: V8 Autoroller <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/6.9.326@{#1}
Cr-Branched-From: 9942994e33098e4178c026e41569b472553009fe-refs/heads/master@{#54310}