Performance and stability improvements on all platforms.

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

Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
Change-Id: I3c1bde19be6d037579b4e08b8099e3f3b3b80754
Reviewed-on: https://chromium-review.googlesource.com/1183950
Reviewed-by: V8 Autoroller <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/7.0.245@{#1}
Cr-Branched-From: 167f9546fa5588cecf57899d858ebdd8af9c6f48-refs/heads/master@{#55275}