Re: [LAD] malloc in fftw

Hi, I suppose that many of you are or might be using fftw for real-time audio processing, and I think the following information may be of your interest. I just came to realize that fftw_execute calls malloc. This happens even though you create a 'plan' where you pass fftw_malloc preallocated input and output buffers. [ ... ] I wrote the fftw developers and they confirmed the memory allocation takes place. They suggested the following: > Try planning with the undocumented flag FFTW_NO_BUFFERING, which will > prevent the use of malloc() in common cases. This is not > foolproof---some transforms are very hard to do without additional > buffers, but if all you are trying to do is vanilla out-of-place 1D > transforms without large prime factors it should work.