memory allocation for Python list

bearophileHUGS at lycos.com bearophileHUGS at lycos.com
Wed Mar 26 14:32:03 CET 2008


dmitrey:
> As I have mentioned, I don't know final length of the list, but
> usually I know a good approximation, for example 400.

There is no reserve()-like method, but this is a fast enough operation
you can do at the beginning:

l = [None] * 400

It may speed up your code, but the final resizing may kill your
performance anyway. You can try it. Just using Psyco is probably
better.

Bye,
bearophile



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