Hello Malcolm, > The Intel compiler is alot better in this regard. In fact, I've yet to find > code where the Intel compiler doesn't humiliate the GCC compiler's generated > binaries. Interesting. I have been testing the intel compiler with various releases from time to time, but hardly find it producing binaries which show any significant improvement. For example I have just recently compared icc8 againt gcc3.4.0 with gzip and bzip2 (as I use those programs fairly heavily). I was not able to measure any performance increase with icc8, when testing the programs on pII cpus. For sure I'd like to see the icc compiler really in action but so far I've yet to discover a program where it actually makes any improvement over gcc. About the link you sent in another email: I am sceptical about claims coming directly from Intel, as I suspect them to be just marketing blurb. If some independant sysadmin confirms their figures with a mysql running in a real world production system I would be more satisfied. -- ---> doj / cubic ----> http://cubic.org/~doj -----> http://llg.cubic.org