Performance and stability improvements on all platforms.

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

Change-Id: I764cfb917f6ae619b6c7603c784e167465352f4c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1529932
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.5.69@{#1}
Cr-Branched-From: 55bbcc4c0893dcefff6b44099c5a99f1ea1b267b-refs/heads/master@{#60312}