I don't have any good answers for you and am looking forward to responses from others. Meanwhile, it might be good to know if you are using 32-bit or 64-bit mode. The default for gcc's floating point is x87 in 32-bit and it is SSE2 in 64-bit. That may affect the performance of your code. Does your application lend itself to any parallelization? For example, openMP? Bob On Sun, 2009-04-19 at 17:18 +0200, Martin Ettl wrote: > Hello all, > > i am playing around with g++-4.3.3 on Ubuntu Linux. The project i am working does a lot of floating point arithmetic (based on double variables). The testplattform i use, is a intel core 2 duo processor. So what optimization flags are good for this plattform? Currently i am using -O3 -funroll-loops, but there are a plenty other. > > Thanks in advance! > > Best regards > > Ettl Martin > >
