bug.py

#!/usr/bin/env python

from __future__ import print_function

import sys
import numpy as np
from time import time

if __name__ == "__main__":
    np.random.seed(123)
    
    N = int(200e6)
    b = np.random.choice(N, N)
    
    x = np.ones((2, 2))
    y = (b - b)
    
    start_time = time()
    for _ in range(3):
        r  = x[0, :][y]
        print(time() - start_time, file=sys.stderr)