Iteration style

Abdullah Khaidar khaidarx at yahoo.com
Fri Sep 24 05:44:10 CEST 2004


Thanks for your correction. Now I've found that using join (list
methods) is better than others.

--M.Abdullah Khaidar
http://khaidarmak.blogspot.com


Michael Hoffman <m.h.3.9.1.without.dots.at.cam.ac.uk at example.com> wrote in message news:<ciubec$obq$1 at pegasus.csx.cam.ac.uk>...
> Abdullah Khaidar wrote:
> 
> > Is there any iteration style we must use to get faster processing
> > time?
> 
> Yes, definitely this one:
> 
> >>>>def useJoin():
> > 
> > 	list = [str(element) for element in range(5)]
> > 	return "".join(list)
> 
> You aren't going to get the right results from your getTimer() function 
> because you are just timing putting the function object on the stack, 
> rather than actually calling it.
> 
> >>>>def getTimer():
> > 
> > 	from timeit import Timer
> > 	t1 = Timer("useListIteration", "from __main__ import
> > useListIteration")
> 
> should be t1 = Timer("useListIteration()", "from __main__ import 
> useListIteration")
> 
> > 	print "Using list iteration: ", min(t1.repeat())
> 
> Of course now that you are actually calling a function, it should take a 
> lot longer, so repeating it 3 * 1,000,000 times is way too many. I would 
> change the number of integers you are concatenating from 5 to 1000 and 
> run Timer.timeit(number=100) (repeats 3 * 100 times) instead.
> 
>  >>> getTimer()
> Using list iteration:  0.751999855042
> Using normal iteration:  0.766999959946
> Using join:  0.446000099182
> 
> HTH,



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