I did not choose "Interpolation 4x";.. I chose "Interpolation 2x", going from 25fps to 50fps. Section size on mine was 200, padding was 80. I can probably increase those, but I get "Out of Memory" in Split-frames mode if I leave the defaults to 500/200, even with a 6gb card.
I noticed you're going from 23.976 (24fps) fps to 95.. then telling DAIN to go back down to 60?? Why? You should probably just go for "Interpolation 2x" to get 47.952 (48fps), or even manually set the final frame rate to 59/94 (60fps).
I am guessing the 4x interpolation (instead of 2x) and forcing DAIN to convert from 95fps to 60fps is why yours is taking so long.
I wonder if we had CUDA version 9 (that they used to test) and a Pascal (not Turing) based graphics card, if it would work faster. I also wonder about virtual memory, input resolutions, different imported codecs supported, etc. There's too many variables.