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Per-query latency (ms) for different queries, collections, and retrieval depths.
| Collection | ClueWeb09b | ClueWeb12-B13 | ||||
|---|---|---|---|---|---|---|
| Retrieval depth k | 10 | 100 | 1000 | 10 | 100 | 1000 |
| TREC 2005 queries | ||||||
| Lucene: exhaustive Or | 331 | 371 | 521 | 321 | 371 | 669 |
| Lucene: Bmw | 96 | 137 | 370 | 94 | 148 | 489 |
| Speedup | 3.4
|
2.7
|
1.4
|
3.4
|
2.5
|
1.4
|
| TREC 2006 queries | ||||||
| Lucene: exhaustive Or | 424 | 464 | 659 | 404 | 442 | 693 |
| Lucene: Bmw | 123 | 191 | 431 | 127 | 186 | 526 |
| Speedup | 3.4
|
2.4
|
1.5
|
3.2
|
2.4
|
1.3
|
