indeed
```
In [51]: tt = np.random.rand(3, 3)

In [52]: %timeit int(hashlib.sha1(tt).hexdigest()[:8], 16)
1000000 loops, best of 3: 1.58 µs per loop

In [53]: %timeit hash(tt.tostring())
1000000 loops, best of 3: 270 ns per loop

```