Spacesaver doesn't propagate through matrix multiplies:

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import Numeric x=Numeric.zeros((3,3), Numeric.Float32) x.savespace(1) x array([[ 0., 0., 0.], [ 0., 0., 0.], [ 0., 0., 0.]],'f') x.spacesaver() 1 y = Numeric.matrixmultiply(x, x) y array([[ 0., 0., 0.], [ 0., 0., 0.], [ 0., 0., 0.]],'f') y.spacesaver() 0