Performance and stability improvements on all platforms.

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

Change-Id: Ie95b25b75fae862e9f03230b6be1160d8fd875e5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1571127
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.5.283@{#1}
Cr-Branched-From: dd94e67444d24fd77f5c05455442211facfebf84-refs/heads/master@{#60888}