passive focusing

    Rig consists of Nano & Raspberry Pi V2 noire Camera Module hooked on salvaged motorised lenses fully controlled by own soft real time subsystem.
    Simplified case; static object, maximal zoom, shallow depth of field, infinity outward.
    Any idea for Nano, how long would it take to calculate single pass on 100 X 100 pixels ROI, Tenengrad focus measure operator, that proved the best in my RPI3b case ? 
    Any better passive focusing algo optimised for Nano ?
    My first Nano arrives in 10 days, pardon my ignorance, can the power of NVIDIA cores be unleashed on passive focusing algo, whatever it might be ?

   Cheers to all Nano newcomers

I am sorry to tell current we don’t support focus function yet.