This improves performance a little for especially small parsed
objects, e.g., parsing json-parse-financial data in kraken 100.000
times goes from 3.25 s to 3.1 or below.

Change-Id: Ic9b668b44fc766da9d8ad03f51924f7dd8b5cc7a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2752881Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73360}