On Jul 26, 7:44 pm, Paul Rubin <http://[EMAIL PROTECTED]> wrote: > Istvan Albert <[EMAIL PROTECTED]> writes: > > exceeded 10 million the zip function slowed to a crawl. Note that > > there was memory available to store over 100 million items. > > How many bytes is that? Maybe the items (heap-allocated boxed > integers in your code example) are bigger than you expect.
while I don't have an answer to this the point that I was trying to make is that I'm fairly certain that it is not a memory issue (some sort of swapping) because the overall memory usage with the OS included is about 1Gb (out of available 2Gb) I tested this on a linux server system with 4Gb of RAM a = [ 0 ] * 10**7 takes miliseconds, but say the b = zip(a,a) will take a very long time to finish: atlas:~$ time python -c "a = [0] * 10**7" real 0m0.165s user 0m0.128s sys 0m0.036s atlas:~$ time python -c "a = [0] * 10**7; b= zip(a,a)" real 0m55.150s user 0m54.919s sys 0m0.232s Istvan -- http://mail.python.org/mailman/listinfo/python-list
