Performance and stability improvements on all platforms.

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

Change-Id: I6974e537fd0868f4ca786f34257158f97ab96d2f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1676067
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.7.142@{#1}
Cr-Branched-From: 18fcd0b4ee1b14312df00778e121f39d6530a7aa-refs/heads/master@{#62347}