On your/the author's point about estimation of execution time, how valuable is that really? I ask because it seems like something a neural network approach coul

On your/the author's point about estimation of execution time, how valuable is that really? I ask because it seems like something a neural network approach could approximate. It should be relatively easy to generate a large dataset - just compile lots of libraries. Learning a function to approximate that in a small NN with a short inference time seems possible. If it's really one of the keys to getting compile time down, it's worth a shot.