This reverts commit 7e77d7a463.
This slows down receive task processing, tasks all start taking longer and longer, can't figure out why. some kind of lock starvation in the global cache?
will experiment with this more in the ndb-global-cache branch.
lol yolo 982f8a70df/google/cloud/ndb/global_cache.py (L200-L202)
> Not intended for production use. Uses a single process wide dictionary to
> keep an in memory cache. For use in testing and to have an easily grokkable
> reference implementation. Thread safety is potentially a little sketchy.