Kiss FFT replacement
I wonder if there are any plans to replace Kiss FFT with much faster pffft? Here's this older issue: https://monorail-staging.appspot.com/p/webrtc/issues/detail?id=3350
I ran some tests myself (although I was using RNNoise), and on my MacBook Pro (i7) opus_fft (complex, N=960, forward) is about 3.5x slower than pffft_transform_ordered