[Numpy-discussion] Numpy performance vs Matlab.
Wed Jan 7 12:50:54 CST 2009
On 1/7/2009 6:51 PM, Christopher Barker wrote:
> Even with this nifty JIT,
It is not a very nifty JIT. It can transform some simple loops into
vectorized expressions. And it removes the overhead from indexing with
But if you are among those that do
n = length(x)
m = 0
for i = 1.0 : n
m = m + x(i)
m = m / n
m = mean(x)
it will be nifty enough.
> All lot of folks seem to think that the only reason to "vectorize" code
> in MATLAB, numpy, etc, is for better performance. If MATLAB now has a
> good JIT, then there is no point -- I think that's a mistake.
Fortran 90/95 has array slicing as well.
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