Performance and stability improvements on all platforms.

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

Change-Id: Ia087f38d2f6620f25f921c93684787f6eb45e54b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1683622
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.7.172@{#1}
Cr-Branched-From: d9861b2969a01a8cae4f2a4f96de8a5f6587f300-refs/heads/master@{#62481}