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it's not that simple.
the only part that is simple is that the performance differences for madVR are mimimal if not zero on a proper working system.
if you think d3d11 native is the fastest mode for madVR it has to copy the data to dx9 after getting them this is not the case with dxva2 or software decoding.
if transferring big data or doing this copy process is using more processing power is hard to check because it is so little and inconsistent.
in term of rendertiems d3d11 clearly looses on the madVR OSD what ever that is worth i never encountered any real world differences.
i get 1.5 to 3 ms in the madVR OSD just for the d3d11 interop while for software decoding i can't find a reliable number or performance impact.
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