Performance and stability improvements on all platforms.

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

Change-Id: Ie9f573448597975c2329c04c9adc3a01b51afa6d
Reviewed-on: https://chromium-review.googlesource.com/c/1363298
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.3.37@{#1}
Cr-Branched-From: 2f852e5e544d97b1b67fef6b68240050d465cf25-refs/heads/master@{#58046}