Performance and stability improvements on all platforms.

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

Change-Id: Ib882a0fb769e93d329d39d9d7eb624da77fd5176
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1641204
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.7.5@{#1}
Cr-Branched-From: cf1c58153447cfc90e28e16a3fedc0b39570c98d-refs/heads/master@{#61961}