Since a longer time, the SunStudio optimizer creates significantly better optimized code for intel 32 Bit binaries (typically 20%-30% faster than what GCC creates).
If you try to create 64 bit binaries, things look different. If you e.g. get my recent Schily source consolidation, you will see that the Reed Solomon Coder and the libmdigest code get slower binaries from SunStudio. Get ftp://ftp.berlios.de/pub/schily/schily-2009-08-12.tar.bz2 and call: gmake to first create a smake boostrap binary and then use this smake boostrap to create Sun Studio 32 bit binaries. then call: psmake/smake CCOM=cc64 to create 64 Bit Sun Studio binaries psmake/smake CCOM=gcc to create 32 Bit GCC binaries psmake/smake CCOM=gcc64 to create 64 Bit GCC binaries Then call: mdigest/OBJ/i386-sunos5-cc/mdigest -a sha512 some-file mdigest/OBJ/i386-sunos5-cc64/mdigest -a sha512 some-file mdigest/OBJ/i386-sunos5-gcc/mdigest -a sha512 some-file mdigest/OBJ/i386-sunos5-gcc64/mdigest -a sha512 some-file and compare the speed and the user CPU time. You may also chdir to "libedc" and call smake -f speed.mk to create a Reed Solomon speed test..... Is there a chance that SunStudio will get better optimization for amd64? J?rg -- EMail:joerg at schily.isdn.cs.tu-berlin.de (home) J?rg Schilling D-13353 Berlin js at cs.tu-berlin.de (uni) joerg.schilling at fokus.fraunhofer.de (work) Blog: http://schily.blogspot.com/ URL: http://cdrecord.berlios.de/private/ ftp://ftp.berlios.de/pub/schily
