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From: Serhiy Storchaka <storchaka@gmail.com>
Subject: Re: How can I make this piece of code even faster?
Date: Sun, 21 Jul 2013 10:11:27 +0300
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Xref: csiph.com comp.lang.python:50996

20.07.13 23:22, pablobarhamalzas@gmail.com написав(ла):
>          e = math.e
>
>          count = -1
>          for x in range(hidden_num):
>              temp = 0
>              for y in range(input_num):
>                  count += 1
>                  temp += inputs[y] * h_weight[count]
>              hidden[x] = 1/(1+e**(-temp))
[...]
> My question to you is if you an see any obvious (or not so obvious) way of making this faster.

1. Use math.exp() instead of math.e**.

2. I'm not sure that it will be faster, but try to use sum().

   temp = sum(inputs[y] * h_weight[count + y] for y in range(input_num))
   count += input_num

or

   temp = sum(map(operator.mul, inputs, h_weight[count:count+input_num]))
   count += input_num