On 9/2/2010 8:55 AM, Tim Wintle wrote:
On Thu, 2010-09-02 at 12:02 +0200, Michael Kreim wrote:
Hi,
I was comparing the speed of a simple loop program between Matlab and
Python.
Unfortunately my Python Code was much slower and I do not understand why.
The main reason is that, under the hood, cpython does something like
this (in psudo-code)
itterator = xrange(imax)
while 1:
next_attribute = itterator.next
try:
i = next_attribute()
except:
break
a = a + 10
where C (and I'm assuming matlab) does this:
while 1:
i = i + 1
if (i> imax):
break
a = a + 10
Which is to say, 'for' in python is not the same as 'for' in C/matlab
and the latter is what Michael should use in a fair comparison.
Otherwise, apples and oranges.
--
Terry Jan Reedy
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