Performance and stability improvements on all platforms.

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

Change-Id: I9e5aa124c880c0f21a914247a567302c29e816f3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1687993
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.7.185@{#1}
Cr-Branched-From: 74e684700d179e83392bdafbb03b551dfb80a64e-refs/heads/master@{#62517}