hellow ,I have use the nn.GroupNorm  but  the result is bad.
For example,slowly convergnece,hard convergeence,I do not know the reason,I set batch=1.
I try nn.Batchnorm again,it make model convergence fastly. And I will use model.train() when I run the model on the test set,then nn.Batchnom will not use the statical mean and var ,it will use moving average on test set .And I do this ,is this cheating?