On Fri, Nov 4, 2016 at 10:24 AM, Nathaniel Smith <n...@pobox.com> wrote:
> Are you sure fromiter doesn't make an intermediate list or equivalent? It > has to collect all the values before it can know the shape or dtype of the > array to put them in. > fromiter dynamically resizes a NumPy array, like a Python list, except with a growth factor of 1.5 (rather than 1.25): https://github.com/numpy/numpy/blob/bb59409abf5237c155a1dc4c4d5b31e4acf32fbe/numpy/core/src/multiarray/ctors.c#L3721
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