Python3 下载图片的几种方式速度对比

Python3 下载图片的几种方式速度对比

import os
import time
import urllib3
import requests
from PIL import Image
from io import BytesIO
from urllib import request
import numpy as np
urls = ["https://cdn.sstatic.net/Sites/stackoverflow/img/logo.png"]

conf = [1, 0, 0, 0]


def solution1(url):
    response = requests.get(url)
    im = Image.open(BytesIO(response.content))
    return im


def solution2(url):
    file = BytesIO(request.urlopen(url).read())
    im = Image.open(file)
    return im


def solution3(url):
    im = Image.open(urllib3.requests.urlopen(url))
    return im


def solution4(url):
    im = Image.open(requests.get(url, stream=True).raw)
    return im


index = 0
for f in conf:
    index += 1
    if f:
        for url in urls:
            time0 = time.time()
            s = "solution" + index.__str__() + '(url)'
            im = eval(s)
            im = np.array(im)
            print(im.shape)
            sum_time = time.time() - time0
            print('Cost time:', sum_time)

多次实验发现solution1的下载速度最快

Tip：requests.get(url, stream=True)，stream=True代表使用时再下载，只是先建立一个链接