Steven D'Aprano wrote:
On Fri, 02 Apr 2010 19:48:59 -0700, Ethan Furman wrote:
The heuristic I use is, if I expect the try block to raise an exception
more than about one time in ten, I change to an explicit test. In this
case, since the exception should only be raised once, and then never
again, I would use a try...except block.
That was my reasoning as well, but when I timed it for one million runs
(so 1 instantiation, 999,999 simple calls), the __getattr__ time was .5
seconds, the try...execpt block was .6; at ten million it was 5 and 6.
Care to share your timing code? Not that I don't trust your results, but
timings are very sensitive to the exact thing you do, and I'd like to see
what that is.
Happy to do so -- if I made a mistake I'd like to know about it and learn.
It'll have to wait two days 'til I get back to work, though... I'll post
it asap.
~Ethan~
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