Performance and stability improvements on all platforms.

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

Change-Id: Ib43c015615fbc4568a2981ecd903339a0c384703
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1543330
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.5.133@{#1}
Cr-Branched-From: 800616151ef062a42edfa84f956be1f0963823e3-refs/heads/master@{#60502}