On Mon, May 17, 2010 at 11:06 AM, Francesc Alted <[email protected]> wrote: > A Sunday 16 May 2010 21:14:34 Davide Lasagna escrigué: >> Hi all, >> >> What is the fastest and lowest memory consumption way to compute this? >> >> y = np.arange(2**24) >> bases = y[1:] + y[:-1] >> >> Actually it is already quite fast, but i'm not sure whether it is occupying >> some temporary memory >> is the summation. Any help is appreciated. > > Both y[1:] and y[:-1] are views of the original y array, so you are not > wasting temporary space here. So, as I see this, the above idiom is as > efficient as it can get in terms of memory usage.
I thought that this y[:-1] += y[1:] uses half the memory of this bases = y[1:] + y[:-1] _______________________________________________ NumPy-Discussion mailing list [email protected] http://mail.scipy.org/mailman/listinfo/numpy-discussion
