Performance and stability improvements on all platforms.

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

Change-Id: Ibbf9602adf5019da791509a23d74b49b29f10a1a
Reviewed-on: https://chromium-review.googlesource.com/c/1363296
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.3.35@{#1}
Cr-Branched-From: 148ef606a750c04a26d761d1dcccbab9bc4d3d13-refs/heads/master@{#58044}