positive

positive.py

import numpy as np
from time import perf_counter as clock

z = np.random.rand(10**7) - 0.5
res = []
for i in range(30):
    r = []

    a = z.copy()
    t1 = clock()
    a = np.where(a<0, 0, a)
    r.append(clock()-t1)

    a = z.copy()
    t1 = clock()
    a[a<0] = 0
    r.append(clock()-t1)
    
    a = z.copy()
    t1 = clock()
    np.putmask(a, a<0, 0)
    r.append(clock()-t1)

    a = z.copy()
    t1 = clock()
    a = np.maximum(a, 0)
    r.append(clock()-t1)
    
    a = z.copy()
    t1 = clock()
    a = a.clip(0)
    r.append(clock()-t1)

    res.append(r)