Performance and stability improvements on all platforms.

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

Change-Id: I828261ab2185962f0e35b2188b97509398555136
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1652796
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.7.49@{#1}
Cr-Branched-From: beaf1073bd687895b1ca8c81b3327fe2c4d36432-refs/heads/master@{#62103}