> time convert-6.3.1-7 B1.tif B1.ps We try converting a TIFF to Postscript with ImageMagick 6.3.2 and 5.5.7 and 6.3.2 was slightly faster. We know color reduction is slower in recent versions because it accounts for the opacity channel. Might be best to post a URL to your image so we can reproduce the problem.