Performance and stability improvements on all platforms.

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

Change-Id: I95b26e457651ce47a285c68ce339e75717175d62
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1664249
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.7.97@{#1}
Cr-Branched-From: c849d9cd4fbe60c4786806ccb4305d3409d1e6a2-refs/heads/master@{#62233}