Newbie completely confused

[Gabriel Genellina]

En Fri, 21 Sep 2007 13:34:40 -0300, Jeroen Hegeman  
<jeroen.hegeman at gmail.com> escribi�:

> So the first time around the file gets read in in ~0.1 seconds, the
> second time around it needs almost four seconds! As far as I can see
> this is related to 'something in memory being copied around' since if
> I replace the 'alternative 1' by the 'alternative 2', basically
> making sure that my classes are not used, reading time the second
> time around drops back to normal (= roughly what it is the first pass).

> class ModerateClass:
>      def __init__(self):
>          return
>      def __del__(self):
>          pass
>          return
>
> class HugeClass:
>      def __init__(self,line):
>          self.clear()
>          self.input(line)
>          return
>      def __del__(self):
>          del self.B4v
>          return
>      def clear(self):
>          self.long_classes = {}
>          self.B4v={}
>          return

Don't use __del__ unless it's absolutely necesary. ModerateClass.__del__  
does nothing, but its mere existence does not allow the garbage collector  
to work efficiently. If you explicitey call clear() from HugeClass, you  
can avoid using __del__ too. And if B4v is not involved in cycles,  
clearing it is not even necesary.
(BTW, all those return statements are redundant and useless)


-- 
Gabriel Genellina