Experiments performed in late April 2019 on an Intel E5-2699 v4 @ 2.20GHz processor, single thread. Query evaluation latency on the ClueWeb12-B13 collection, running the first 10k queries from the TREC 2005 Terabyte Track efficiency queries:
| Hits | Lucene 7.6 | Lucene 8.0 | speedup |
|---|---|---|---|
| 10 hits | 2885s | 654s | ~3.5 |
| 100 hits | 3209s | 1161s | ~2.8 |
| 1000 hits | 5691s | 4050s | ~1.4 |
Results are averaged over three trials, after discarding a warmup run.