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I mean, if it's using DNN then you're going to be pretty much shit out of luck for perf unless your machine has an nvidia graphics card right?

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If you’re using pretrained models then they should run ok. It’s the same reason why Tensorflow runs on phones: to run models, not necessarily to train models. DNNs take a lot of time to train.

TF runs at seconds-per-frame speeds on phones without dedicated accelerators.

Even inference is going to be slow when working on a 20 megapixel image. That's as much work as a 1220 sample batch at 128x128 resolution.

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