Performance and stability improvements on all platforms.

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

Change-Id: Ifa09b1195e9d3cf97c93d8e40bdb51b0a9bf7c71
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1524638
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.5.47@{#1}
Cr-Branched-From: 4b9b23521e6fd42373ebbcb20ebe03bf445494f9-refs/heads/master@{#60248}