... and introduce a bottleneck for collecting reusable zone memory
statistics.

Tbr: jgruber@chromium.org
Bug: v8:10572
Change-Id: I418f8b495c0d89c0eb73f4e19bc4315acfadb480
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2287500Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68776}