Volume 5 Supplement 1
The FPS fingerprint format and chemfp toolkit
© Dalke; licensee BioMed Central Ltd. 2013
Published: 22 March 2013
During GCC 2010 poster session I presented a draft version of the FPS format for storing dense binary fingerprints. That format is now stable, and supported by RDKit , CACTVS , and other software. The chemfp package is a set of command-line tools and a Python library for fingerprint generation and high-speed Tanimoto search. It can extract pre-computed fingerprints from an SD tag or use OpenEye's OEChem , Open Babel , or RDKit to generate fingerprints. Search uses a combination of careful indexing , CPU-specific instructions (if available), and OpenMP. Nearest-100 similarity searches of PubChem-sized take less than a second on a laptop, and Butina clustering  of 2 million compounds takes about 6 hours on a 15 CPU node. In my poster I present the FPS format and chemfp package, and describe how the memory and performance requirements lead to the internal search architecture.
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