Applying a FIR in frequency domain faster for 1D filters longer than some very small number, usually 7-16. The old school graphics and audio filters are shorter

Applying a FIR in frequency domain faster for 1D filters longer than some very small number, usually 7-16. The old school graphics and audio filters are shorter sure, but they are also horribly bad compared to what you can do with a designed filter in the 20-40 range.