Document Retrieval on Repetitive Collections [article]

Gonzalo Navarro, Simon J. Puglisi, Jouni Sirén
2014 arXiv   pre-print
Document retrieval aims at finding the most important documents where a pattern appears in a collection of strings. Traditional pattern-matching techniques yield brute-force document retrieval solutions, which has motivated the research on tailored indexes that offer near-optimal performance. However, an experimental study establishing which alternatives are actually better than brute force, and which perform best depending on the collection characteristics, has not been carried out. In this
more » ... er we address this shortcoming by exploring the relationship between the nature of the underlying collection and the performance of current methods. Via extensive experiments we show that established solutions are often beaten in practice by brute-force alternatives. We also design new methods that offer superior time/space trade-offs, particularly on repetitive collections.
arXiv:1404.4909v2 fatcat:cn2rng2jrzd4tawh5xv2jfxsb4