Performance and stability improvements on all platforms.

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

Change-Id: Icac5c86c0215d62370c4c96e40c303c0011a60d3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1673824
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.7.135@{#1}
Cr-Branched-From: 489d0df7b22f9028d6bba56afd60e7757c578712-refs/heads/master@{#62325}