Performance and stability improvements on all platforms.

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

Change-Id: I1fea7571b9ff8000ff72c3d42f73a31b29e2e302
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1663560
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.7.96@{#1}
Cr-Branched-From: 16893bda75a1965fff31f397a9474ed2ff9cc92a-refs/heads/master@{#62232}