Performance and stability improvements on all platforms.

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

Change-Id: I0e47885fb9c7036dff84ec084cd81d6b263b12f8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1639953
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.7.2@{#1}
Cr-Branched-From: 27ca3b3dddd43d9c5beb349b0ac930d1d9ed93eb-refs/heads/master@{#61956}