PT - JOURNAL ARTICLE AU - James K Bonfield TI - The Scramble Conversion Tool AID - 10.1101/003640 DP - 2014 Jan 01 TA - bioRxiv PG - 003640 4099 - http://biorxiv.org/content/early/2014/03/28/003640.short 4100 - http://biorxiv.org/content/early/2014/03/28/003640.full AB - Motivation The reference CRAM file format implementation is in Java. We present “Scramble”: a new C implementation of SAM, BAM and CRAM file I/O.Results The C API for CRAM is 1.5–1.7x slower than BAM at decoding, but 1.8–2.6x faster at encoding. We see file size savings of 40–50%.Availability Source code is available from http://sourceforge.net/projects/staden/files/io_lib/