Performance and stability improvements on all platforms.

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

Change-Id: Ia75eafa76d62e468b23dd1c9ad0a40af08a86f4c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1681325
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.7.166@{#1}
Cr-Branched-From: d8c4e4c46590ba5a62d12382a7bcd4ca25bb8436-refs/heads/master@{#62447}