[Dev] performance of prop vs. mod.prop

[Heikki Toivonen]

Our coding guidelines state that we should import a whole module rather 
than properties of the module. While this tends to make the code more 
clear, there is a question about performance.

In other words, is

from mod import prop

# use prop in tight loop

different from

import mod

# use mod.prop in tight loop

I finally decided to measure this, and my tests showed that the second 
form (mod.prop) is over two times slower. It is still pretty fast, so 
unless you are doing tens of thousands of iterations it probably does 
not matter, if even then.

-- 
   Heikki Toivonen


-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 249 bytes
Desc: OpenPGP digital signature
Url : http://lists.osafoundation.org/pipermail/chandler-dev/attachments/20040909/3c82e175/signature.pgp