Why not just re-run a search with a different sort? but if a quasi snap-shot of a set of results needed to be kept, it wouldn’ t solve the problem.
If you kept hold of the same IndexReader, as I understand it, changes to the index would not be reflected.
This seems like it would have some serious performance implications.
No, it doesn't have serious performance implications to keep an IndexReader (or IndexSearcher as the case may be) around. And in fact it is how you'd perform different sorts on the same Query and ensure you get the same set of hits back.
Erik
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