Hello ! 
When I first run object detect example app with provided model (detect.tflite) , it has almost 90 classes with inference time was 30ms…
but I trained with small number of image like 100~200 images and I just have 3 class.
I used mobile net v2 640x640 and didn’t find tune
what make inference time smaller ?
I quantize with float so, my model size is reduced to 4mb from 11mb…
but as to inference time, it remain same.