Hello all,

I am going through a link about generators that someone posted. In the beginning he compares the two functions below. On his setup he showed a speed increase of 5% with the generator.

I'm running windows XP, python 3.1.1, and cannot seem to duplicate the results. I keep showing the "old way"(logs1) as being slightly faster when tested with the provided logs and up to 1GB of duplicated data.

Can someone help me understand whats happening differently?

Thanks!

def logs1():
wwwlog = open("big-access-log")
total = 0
for line in wwwlog:
    bytestr = line.rsplit(None,1)[1]
    if bytestr != '-':
        total += int(bytestr)
return total

def logs2():
wwwlog = open("big-access-log")
bytecolumn = (line.rsplit(None,1)[1] for line in wwwlog)
getbytes      = (int(x) for x in bytecolumn if x != '-')
return sum(getbytes)