Hi, I have some large xml-files which I have to parse, and I have used latest Gambit + ssax on my 64-bit (now :-) computer, Linux. My program parses my file in 150 seconds. After adding (declare (not safe... ) and so on, and compiling with -02 I get it down to 140 seconds, tweaking ssax itself the same way gives me 115 seconds. The parser is so far doing nothing - it just runs through the data. Doing the same thing in Java takes about 3 secs, using expat from C makes it 2 secs. But my math works blazingly fast in Gambit. Is there any thing I can do to make the xml-parsing faster? I have found some papers that claim ssax to be as quick as expat (http://okmij.org/ftp/Scheme/SSAX-benchmark-1.html) - as I have some thousand of these files to parse, a speedup would really make a difference. Clues on this one? Cheers, Petter