Performance and stability improvements on all platforms.

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

Change-Id: Iac423630389d012dcf2d0dfa432d12a07d693939
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1521219
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.5.30@{#1}
Cr-Branched-From: ac719747442b08a16e41b3460bc8d0c3377b5a64-refs/heads/master@{#60215}