def draw(cdf, size=None):
    """
    Generate a random sample according to the cumulative distribution
    given by `cdf`. Jit-complied by Numba in nopython mode.

    Parameters
    ----------
    cdf : array_like(float, ndim=1)
        Array containing the cumulative distribution.

    size : scalar(int), optional(default=None)
        Size of the sample. If an integer is supplied, an ndarray of
        `size` independent draws is returned; otherwise, a single draw
        is returned as a scalar.

    Returns
    -------
    scalar(int) or ndarray(int, ndim=1)

    Examples
    --------
    >>> cdf = np.cumsum([0.4, 0.6])
    >>> qe.random.draw(cdf)
    1
    >>> qe.random.draw(cdf, 10)
    array([1, 0, 1, 0, 1, 0, 0, 0, 1, 0])

    """
    if isinstance(size, types.Integer):
        def draw_impl(cdf, size):
            rs = np.random.random_sample(size)
            out = np.empty(size, dtype=np.int_)
            for i in range(size):
                out[i] = searchsorted(cdf, rs[i])
            return out
    else:
        def draw_impl(cdf, size):
            r = np.random.random_sample()
            return searchsorted(cdf, r)
    return draw_impl