[Numpy-discussion] 2 i/o questions and an announcement
nick at nickbower.com
nick at nickbower.com
Sat Sep 9 00:15:51 EDT 2000
> From my understanding of the code, Numpy2 uses the buffer
> interface. This would be the basis for a fast exchange of data between
> PIL and Numpy arrays.
I should have been more specific <:) This problem was related to the
current version of NumPy's interaction with PIUL.
> Regarding IO the pickling of arrays is quite
> fast. Have you tried this already?
So is array.fromfile (faster I would expect). The issue at hand is not
the read speed, but avoiding reading into memory then re-copying it over
to NumPy formats.
> That's right. If you want to read binary formats, for which you
> know the data layout the numpyio package from Travis
> Oliphant is very fast and memory efficient, because it
> builds up the array during the read/write so no copy
> of the data string needs to be in memory.
Ah-ha! Sounds exactly what I wanted. I'll check it out.
Thanks, Nick.
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