Performance and stability improvements on all platforms.

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

Change-Id: I3d29b07459d14eba0c3441f26fc4847b69730408
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1536854
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.5.115@{#1}
Cr-Branched-From: 26ffe82e7057dd7464062b764c24145ae8564dff-refs/heads/master@{#60449}