LRU-based cache implementation

[luisjakon]

Would it be possible to include an lru-based cache implementation in order to better manage memory consumption? Something like https://github.com/maidsafe/lru_time_cache would be very useful.

On a side note, is there any particular reason the yield_count property hard-coded to 10? Thanks!

[cksac]

you can implement Cache for cached::Loader
https://github.com/cksac/dataloader-rs/blob/master/src/cached.rs#L8

10 is default value, you can change it by with_yield_count when creating the loader