It is something with my local python. I've tried to run some code to get it busy

n = 100000
r = n + (n - 1)
for i in range(n):
    s = r - (n + i)
    h = r - (s * 2)
    print(' ' * s, '#' * h)

Time shows 5.01s that is too long. On another machine, time is less and there is no image tearing with the same code. Question is closed.