Performance and stability improvements on all platforms.

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

Change-Id: Ibff92066f5f7648fc9211e4d39b84fe8263d3ad8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1535949
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.5.94@{#1}
Cr-Branched-From: 4f2586b926bd8eb4a3c0cba8ef96738287e9a21e-refs/heads/master@{#60410}