EG/HM: Synchronized only for putting in docsetCache
EG/HM: KeyCollector and CachingKeyCollector with same interface
EG/HM: Put keyCollector in cache after searching; Size from 10 to 20
EG/HM: Replaced getFilter on CachingKeyCollector with a KeyFilterCache
EG/HM: KeyFilterCache
EG/HM: Extracted cache in a KeyCollectorCache; Refactor CachingKeyCollector to a simple caching KeyCollector
EG/HM: Printed some cache stuff
EG/HM: Remove old code
EG/HM: Better print size
EG/HM: Print bytes per doc
EG/HM: Cardinality can be 0
EG/HM: Use PForDeltaDocIdSet in the cache
EG/HM: Ignore IndexOutOfBoundsException; Key does not exist
EG/HM: b.iterator() can be null
EG/HM: Disabled prints