Performance and stability improvements on all platforms.

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

Change-Id: Ieb9a81470678473ec6e8dfa43286812092cc9057
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1547421
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.5.152@{#1}
Cr-Branched-From: 8d6da7085717606b1470d8fe5774f308adfebf1a-refs/heads/master@{#60549}