Initially it might, but probably eventually not. I was
thinking Lucene formats might also be bit more compact
than vanilla hash maps, but I guess that depends on
many factors. But I will probably want to play with
actual queries later on, based on frequencies.
OK.
In the latter case, are you using
org.apache.lucene.store.RAMDirectory or
org.apache.lucene.index.memory.MemoryIndex?
I'm using RAMDirectory. Should I be using MemoryIndex
maybe instead (I'll check it out)?
The main constraint is that a MemoryIndex instance can only hold
*one* lucene document (though it can have any number of fields).
MemoryIndex is designed to be a transient throw away data structure,
for streaming / publish-subscribe usecases. If it's applicable,
MemoryIndex has better performance but worse memory consumption than
RAMDirectory. I can't tell whether that may or may not be an issue
for your case.
Wolfgang.
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