Performance and stability improvements on all platforms.

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

Change-Id: I5199a2fba5af48a23622a83f6416996cb95f73f9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1650565
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.7.29@{#1}
Cr-Branched-From: 06663094f4efbaf98784c80955856f050fa65341-refs/heads/master@{#62060}