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From Mark Miller <>
Subject Re: about TopFieldDocs
Date Mon, 05 Jan 2009 13:55:49 GMT
Erick Erickson wrote:
> The number of documents
> is irrelevant here, what is relevant is the number of
> distinct terms in your "fieldName" field.
Depending on the size of your index, the number of docs will matter
though. You have to store the unique terms in a String[] array, but you
also store an int[] array the size of maxdoc that indexes into the
unique terms array. Depending on your index, this could be as much or
more of a cost than the unique terms.

It doesn't matter how many documents you get back though for a
particular search - its just how many docs are in the index.

- Mark

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