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There are many practical benchmarks on which to rate an information
retrieval system beyond its retrieval quality. These include:
All these criteria apart from query language expressiveness are
straightforwardly measurable: we can quantify the speed or size.
kinds of feature checklists can make query language expressiveness
- How fast does it index, that is, how many documents per hour does it
index for a certain distribution over document lengths?
(cf. Chapter 4 )
- How fast does it search, that is, what is its latency as a
function of index size?
- How expressive is its query language? How fast is it
on complex queries?
- How large is its document collection, in terms of the number of
documents or the collection having information distributed across a
broad range of topics?
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