Results for gzip and bzip2 are not included because they were consistently 10 times slower. Comparison tests on single image files. Compression Number Original Compr. The final tests were to determine performance on large multi-extension FITS image files. The results are summarized in Table 2 .
Performance results on large multi-extension FITS files.
Compression File Number Original Compr. References Pence, W. D. 1992, in ASP Conf. 25, Astronomical Data Analysis Software and Systems I, ed. 61, Astronomical Data Analysis Software and Systems III, ed.