[P] Need suggestions on which optimizers to use for our self-driving car DeepLearning Model. • r/MachineLearning

We are currently using basic Adam optimizer, but the training time increases dramatically after third epoch. We were not able to go beyond 4th epoch due to continual increase of training time. Our Model uses Keras 2.0. Training takes about an hour per epoch ( up to third epoch) on Nvidia Tesla K80. The model contains both classification and regression, concatenated at the end.