one trial took 7 hours and block in the 32th epoch

[luna9722]

Hello everybody, I am using keras tuner version 1.0.1 with tensorflow 2.0.0 to fine tune the learning rate, batch-size and the number of epoch.

as you can see only one trial with learning rate=0.01, batch size=8 and number of epochs=80 took 7 hours until only the 32th and the colab bans me from using the gpu ( the google account is brand new, only used it for this notebook) and the results are very poor.
while without keras tuner 100 epochs doesn't even take 2 hours for this batch size and this learning rate and the training iou already get the value of 0.78 and val_iou=0.3 from the first epoch while for the first epoch with keras tuner :

Can someone help me with this problem?
N.B I used the subclass provided here in the documentation #122

[luna9722]

solved by setting tensorflow version to 2.1