16 bit precision for cnn_learner?

Part 1 (2019)
1

Does it make sense to have a half precision mode for cnn?

The docs mention here
https://docs.fast.ai/callbacks.fp16.html
The use of the class, learner.to.fp_16, to double the speed.

How can this be applied to the class, cnn_learner which has no attribute ‘.to.fp_16’

2

Hey, I remember using it with a cnn_learner. Link to notebook

3

Learner(data, model, metrics=[accuracy]).to_fp16() not to.fp16()

4

I realize there is a Learner.to_fp16 . I am asking about a cnn_learner. These docs
https://docs.fast.ai/vision.learner.html

do not indicate that attribute. How could we modify cnn_learner to use half precision?

5

cnn_learner is just a function that returns a Learner object.

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