What's the fastest way to convert an interleaved NumPy integer array to complex64?
[~]|1> import numpy as np[~]|2> a = np.zeros(1000000, dtype=np.int16)[~]|3> b = a.astype(np.float32).view(np.complex64)[~]|4> b.shape(500000,)[~]|5> b.dtypedtype('complex64')