[Numpy-discussion] matlab vs. python question
Thu Apr 26 08:04:42 CDT 2007
On 4/26/2007 2:42 PM, David Cournapeau wrote:
> You are true for the semantics, but wrong for the consequences on
copying, as matlab is using COW, and this works well in matlab.
It works well only if you don't change your input arguments. Never try
to write to a matrix received as an argument in a function call. If you
do, the memory expenditure may grow very rapidly.
But as long a s NumPy does not use lazy evaluation the difference is not
as striking as it could be.
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