import time
import numpy as np

start = time.perf_counter()
b = np.random.rand(512,256).astype(np.float32)
c = np.tile(b[np.newaxis,:,:,np.newaxis], [100,1,1,3])
print(time.perf_counter() - start)


start = time.perf_counter()
e = np.random.rand(512,256).astype(np.float32)
f = np.ones((100,512,256,3)) * b[np.newaxis,:,:,np.newaxis]
print(time.perf_counter() - start)

print()

# start = time.perf_counter()
# a = a * b[np.newaxis,:,:,np.newaxis]
# print(time.perf_counter() - start)

# start = time.perf_counter()
# d = a * b[np.newaxis,:,:,np.newaxis]
# print(time.perf_counter() - start)

# start = time.perf_counter()
# a *= c
# print(time.perf_counter() - start)