Performance and stability improvements on all platforms.

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

Change-Id: I15f1cc98869db0657a92eb725ce305eb477cb65a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1547686
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.5.153@{#1}
Cr-Branched-From: 13730cee5d92a19308e6bada605757db7ffc1195-refs/heads/master@{#60551}