optimzer's step counter 'cnt' incremented in multiple places

[yvdriess]

Optimizer class tracks a cnt counter to decide when to apply the minibatch update. However, it appears that the counter is incremented not only in the _learn driver loop (

vectorflow/src/vectorflow/optimizers.d

Line 138 in d26cd9d

cnt++;

), but also in the concrete optimizer class update_general methods (

vectorflow/src/vectorflow/optimizers.d

Line 307 in d26cd9d

cnt++;

), which is called once for each layer for each step.

Is this intended behavior? The minibatch update can trigger in some middle layer and reset the counter, rather than every mini-batch-size number of observables backprops.