Performance and stability improvements on all platforms.

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

Change-Id: Ic186358a40a9f8c20ab90d40f2055b376f9bcb89
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1572198
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.5.286@{#1}
Cr-Branched-From: d1068b4f919952b2aa6f193a3772d5bf5c50ccbe-refs/heads/master@{#60907}