Performance and stability improvements on all platforms.

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

Change-Id: Id914f462d479002c8df602085fcd62a5ecb9e145
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1551408
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.5.181@{#1}
Cr-Branched-From: 329b695d4d3ad323c3283dda9ef3345edc08425f-refs/heads/master@{#60620}