Why does np.save() take so much space on disk

Question

The numpy array which I am storing contains an image. The size of the image is 23.4 KB but the size of the .npy file is 4 MB

import numpy as np
from keras.preprocessing.image import load_img,img_to_array

image=load_img('image.JPEG')
array=img_to_array(image)
np.save('sample.npy',array)

Answer 1

numpy.save()

• uncompressed binary file

if you need to compress it use

numpy.savez_compressed()

• compressed using zipped archive