On Tue, Aug 4, 2009 at 7:18 PM, Jochen <cycoma...@gmail.com> wrote: > Hi all, > I see something similar on my system. > OK I've just done a test. System is Ubuntu 9.04 AMD64 > there seems to be a regression for float32 with high values: > > In [47]: a=np.random.rand(10000).astype(np.float32) > > In [48]: b=np.random.rand(10000).astype(np.float64) > > In [49]: c=1000*np.random.rand(10000).astype(np.float32) > > In [50]: d=1000*np.random.rand(1000).astype(np.float64) > > In [51]: %timeit -n 10 np.sin(a) > 10 loops, best of 3: 251 µs per loop > > In [52]: %timeit -n 10 np.sin(b) > 10 loops, best of 3: 395 µs per loop > > In [53]: %timeit -n 10 np.sin(c) > 10 loops, best of 3: 5.65 ms per loop > > In [54]: %timeit -n 10 np.sin(d) > 10 loops, best of 3: 87.7 µs per loop > > In [55]: %timeit -n 10 np.sin(c.astype(np.float64)).astype(np.float32) > 10 loops, best of 3: 891 µs per loop >
Is anyone with this problem *not* running ubuntu? Chuck
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