Bitfunnel is a fast, reliable document search engine based on Bloom filter signatures, rather than inverted indexes. Bing's use of BitFunnel resulted in substantial operational cost savings. "BitFunnel: Revisiting Signatures for Search" won Best Paper at Sigir '17. This 22 minute video provides a helpful introduction to BitFunnel's innovative search technology.
This repository offers tools that simplify the work needed to set up a BitFunnel environment and compare the performance and operational behavior of BitFunnel to other notable document search engines, such as Lucene, MG4J and Partitioned Elias Fano.