Performance and stability improvements on all platforms.

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

Change-Id: I8fc3b9d66eda6e0c794367ed3f3c8fd480c7282d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1565178
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.5.267@{#1}
Cr-Branched-From: 3478f053d4e5eb11e891c0bb7e93c1b5a34ba5b3-refs/heads/master@{#60814}