Thanks, it's the same on my PC. .NET version with DirectML runs 1.5x faster than 6.2 with CUDA on the nvidia GPU. That's odd.I find Object Detection (YOLOv5 .NET) works the best. You can test it your self by using Explorer like the below screenshots. Just remember you can only have one Object Detection module enabled at a time.
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The accucary of inferences is similar. They are obviously different as order of low-level operations, etc should exactly meet to have the same result, that I highly doubt if could be possible as one is DirectML and the other is CUDA based..
However mine is in the 30 inferences/second range while yours is above 110. Do you run the .NET version on CPU or on GPU? If on CPU then what kind of CPU, if on GPU then what graphics card do you have?