From doc I've read that
With the current implementation, all _id values are loaded to memory (heap)
in order to support fast lookups, so make sure there is enough mem for it.
So I hope that this implementation will be improved. It will be great
if SimpleIdCache will obtain LRU behaviour. And if it will be filled by demand.
I mean that if I have query with filer that should go through some *filtered
- set of parent and child docs then only this doc ids appended
to SimpleIdCache but not all.
No announcements about improving this code?