I am padding sequences for a GRU based classifier that I am building in Keras. I'm wondering if there's any accepted best practice for padding the leading or trailing side of the sequence.
sequence = [1,2,3,4]
leading_pad = [0,0,0,1,2,3,4]
trailing_pad = [1,2,3,4,0,0,0]
In other projects I have generally padded the leading end of the sequence as a convention imprinted on me by various blogs, course work and other examples.
My question: is there any research that shows whether or not it matters which side of the sequence you pad? Or am I completely over thinking this?
Any advice would be much appreciated.