Which is faster?

Tony Meyer t-meyer at ihug.co.nz
Thu Jan 27 03:52:54 CET 2005


> Any idea which of the following is faster?
> 
> 'a/b/c/'[:-1]
> 
> or
> 
> 'a/b/c/'.rstrip('/')
> 
> Thanks in advance.
> 
> P.S. I could time it but I thought of trying my luck here 
> first, in case someone knows already, and of course the reason.

Timing it is almost no work, though:

>>> import timeit
>>> timeit.Timer("'a/b/c/'[:-1]").timeit()
0.23856551600831949
>>> timeit.Timer("'a/b/c/'.rstrip('/')").timeit()
0.74258655778876914

The obvious reason for the former to be faster (although I haven't checked
to see whether it's true) is because the latter checks for a specific
character, whereas the former just snips it off whatever it is.

=Tony.Meyer




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