performance of Nested for loops

[Larry Bates]

You can use xrange(N) that way Python doesn't have
to build the 10000 item lists 20000 times.  Other than
that one would need to know why you would call do_job1
and do_job2 10000 times each inside a 10000 iteration
loop.  Most VERY large performance gains are due to
better algorithms not code optimization.

Larry Bates


querypk at gmail.com wrote:
> Is there a better way to code nested for loops as far as performance is
> concerned.
> 
> what better way can we write to improve the speed.
> for example:
> N=10000
> for i in range(N):
>    for j in range(N):
>        do_job1
>    for j in range(N):
>        do_job2
>