31 mar 2010 kl. 10.21 skrev Michael Stoppelman:
I was wondering why the InstantiatedIndex gets very slow as the
number of
documents increases in the index. I've been looking at the source
and have
only found comments saying "it's slow" when the index is big but not
why. Do
folks just run out of memory or something deeper?
I think the main reason is that the time saved by not deserializing
data from the store at some point point fades to the time complexity
of executing a binary searches for document numbers associated to a
term. I've never seen it act slower than RAMDirectory though.
Perhaps the binary search could be made more efficient by adding more
indices (maps) but would probably consume a lot more memory.
karl
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