[Python-Dev] 2.5a2 try/except slow-down: Convert to type?

[Fredrik Lundh]

Fredrik Lundh wrote:

>> Could it just be that instantiating instances of new-style classes is
>> slower than instantiating instances of old-style classes?  There's not
>> anything in what you've posted to suggest that exceptions are involved
>> directly.

for completeness, here's the corresponding results from 2.4:

python -mtimeit -s "class Exception(object): pass" "Exception()"
1000000 loops, best of 3: 0.278 usec per loop

python -mtimeit -s "class Exception: pass" "Exception()"
1000000 loops, best of 3: 0.387 usec per loop

python -mtimeit "Exception()"
1000000 loops, best of 3: 0.989 usec per loop

> python -mtimeit -s "class Exception(object): pass" "Exception()"
> 1000000 loops, best of 3: 0.284 usec per loop
> 
> python -mtimeit -s "class Exception: pass" "Exception()"
> 1000000 loops, best of 3: 0.388 usec per loop
> 
> python -mtimeit "Exception()"
> 1000000 loops, best of 3: 1.95 usec per loop

</F>