Numba code slower than pure python

Question

I\'ve been working on speeding up a resampling calculation for a particle filter. As python has many ways to speed it up, I though I\'d try them all. Unfortunately, the numba ve

Answer 1

Faster numpy version (10x speedup compared to numpy_resample)

def numpy_faster(qs, xs, rands):
    lookup = np.cumsum(qs)
    mm = lookup[None,:]>rands[:,None]
    I = np.argmax(mm,1)
    return xs[I]