> through the kernel.  Not so much for the speed aspect, but to free
> up CPU cycles that can be devoted to actual SDR work.

those 2x25kHz channels would hardly need many cycles. rather it's just
a matter of selecting the right CPU that can actually do the FFT with
some software floating point implementation :)

i don't see memory bandwidth or even random memory access latency
affecting this scenario in the slightest.

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