Performance and stability improvements on all platforms.

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

Change-Id: I37f3480b690e4681b8a4aa250ca11f2a909889b5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1676077
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.7.146@{#1}
Cr-Branched-From: e101b9c03c31671b6bf75f10d06fc1245e6b12ab-refs/heads/master@{#62358}