On Monday 16 August 2004 8:25 am, Horvath Andras wrote: > Without any change in arguments of gcc calls I get 2% speed improvement > in our code. (Mainly floating point calculations.) Now I will try > whether some special command line switches work better in 3.4.1. It you're building for a x86 platform you might also want to try Intel's compiler, ICC. It's a very good compiler overall, but it's main strength, relative to GCC, is floating-point performance. The Linux version comes in RPM packages and is free for personal use. See: http://developer.intel.com/software/products/compilers/clin/ Hope this helps.