Efficient coding advice?
Johann Hibschman
johann at physics.berkeley.edu
Tue Apr 25 12:09:09 EDT 2000
Kelvin Chu writes:
> data = fp.readframes(nframes)
> left = Numeric.zeros(nframes)
> right = Numeric.zeros(nframes)
> for i in range(0,nframes):
> left[i] = ord(data[i*2])
> right[i] = ord(data[i*2+1])
Try:
ords = map(ord, data) # take the ord of all the chars
ords.shape = (nframes/2, 2) # reshape the array in place
left = ords[:,0] # pick out individual columns
right = ords[:,1]
That should be durn fast, as long as "readframes" isn't the bottleneck.
--
Johann Hibschman johann at physics.berkeley.edu
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