On Mon, May 27, 2013 at 11:25 PM, Campbell Barton <ideasma...@gmail.com> wrote: > On Tue, May 28, 2013 at 6:54 AM, Jürgen Herrmann <shadow...@me.com> wrote: >> I am just trying to help because i really like blender. >> As for optimization, this would be a subject for a deep inspection of >> blenders code base. I think every compiler hat it pros and cons. In the end >> they all do the same. >> MinGW/GCC is faster than msvc with floating point operations. >> Therefore MSVC is faster on integer ops. > > Not sure why MSVC would be faster at integer ops because its slower at > floats? is there any performance tests showing this?
There's no reason to think that would be the case, there's no tradeoff to make between integer and float performance on the same processor. > IIRC - Brecht said it wasn't floating point operations being faster on > MinGW, it was GCC's library of floating point math functions (assume > sin/cos/sqrt/pow... etc). > Though he also said this needing further investigation. > > If this is really the case it may be possible to replace MSVC's math > functions though Im not sure if this would give hard-to-fix linking > issues if dependencies are still using MSVC's math functions. I don't know the cause of the performance difference, some else suggested it's the floating point math functions but I don't know if that's the case. I'll make some time to do performance profiling on Windows, no point speculating about this when we no one has even run a basic profiler and checked if any unexpected slow functions show up. Brecht. _______________________________________________ Bf-committers mailing list Bf-committers@blender.org http://lists.blender.org/mailman/listinfo/bf-committers
