Generator slower than iterator?

[MRAB]

Federico Moreira wrote:
> Great, 2min 34 secs with the open method =)
> 
> but why?
> 
> ip, sep, rest = line.partition(' ')
>        match_counter[ip] += 1
> 
> instead of
> 
> match_counter[line.strip()[0]] += 1
> 
> strip really takes more time than partition?
> 
> I'm having the same results with both of them right now.
> 
I think you meant split(), not strip().

split() might split the string into many parts, but you want only the 
first part (at most 1 split), so the extra splits are unnecessary and 
waste time. split(None, 1) and partition(' ') do at most 1 split, so 
they don't do unnecessary work.