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Table 6 Time required for retrieval runs, comparing Lucene to different Ivory configurations.

From: Is searching full text more effective than searching abstracts?

  Lucene (1 core) Ivory (10 cores) Ivory (20 cores)
Abstract (1000 hits) 1 m 42 s 51 s 40 s
Article (1000 hits) 7 m 00 s 1 m 51 s 1 m 09 s
Span (5000 hits) 21 m 32 s 11 m 57 s 8 m 25 s