Performance and stability improvements on all platforms.

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

Change-Id: Ice2720dd0568ad1b10d9592db7af24513bf736bc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1655029
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.7.50@{#1}
Cr-Branched-From: de935145754080c9810d5a93c2ae8fed4d408760-refs/heads/master@{#62104}