DeepSpeech Support for NNAPI/Delegates

@lissyx Does deepspeech 0.6 alpha versions support ARM NNAPI and support delegates for GPUs like Mali T-880? Have you or someone done any bench marking on performance improvements in terms of inference times w.r.t using ARM CPU Vs using these delegates which make use of the GPU?

I have local patches that does enable those feature, but as much as we could test:

  • NNAPI gives no gain
  • GPU delegation gives no gain
  • Both are not happy with our current model, and the limitations are pretty hard

Some measures:
Branch (quite old):