[Python-Dev] default of returning None hurts performance? (original) (raw)

Jake McGuire mcguire at google.com
Tue Sep 1 18:40:17 CEST 2009


On Mon, Aug 31, 2009 at 5:01 PM, Greg Ewing <greg.ewing at canterbury.ac.nz>wrote:

Antoine Pitrou wrote:

Did your coworker run any timings instead of basing his assumptions on bytecode size?

In any case, what are you suggesting -- that the last value returned by a function call in the body should be the default return value? I don't think the unpredictability that would introduce would be a good idea.

Never mind the fact that there is a lot of Python code out there that assumes that functions without an explicit return value, return None.

This is pretty fundamental to the Python API.

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