title: Using python (urllib/urllib2) to download images is very slow
body: <p>i'm trying to download magic the gathering cards' images from scryfall.com. they provide this json file with all informations about every single card (including the url for its image). so i wrote a code that reads every url from that json file, and attemps to save it. the thing is, the request part of the code takes more than 5 minutes per image to run and i have no idea why. (the size of each image i'm fetching is less than 100kB and opens instantenously on the browser)</p>
  
  <p>i have tried urllib.urlretrieve, urllib2.urlopen, and it's all the same. tried running it on both python2 and python3.</p>
  
  <p>no error messages, the code actually works, only the long time it takes makes it unviable to carry on with it.</p>
  
  <p>edit: </p>
  
  <pre><code>a=open("cards.json")
  b=a.read()
  
  data=[]
  data.append(b)
  
  count=0
  for elem in data:
      try:
          content=json.loads(elem)
      except:
          print content
          exit()
      for j in content:
          count=count+1
          if j['layout']=='normal' and j['digital']==False:
              url=str(j['image_uris']['normal'])
              final=url[url.find('normal')+6:]
              print (url)
              print("a")
              i1=urllib.urlretrieve(url)
              print("b")
              i2=i1.read()
              file=open(str(count),'wb')
              file.write(i2)
              file.close()
  
  
          if count&gt;5:
              exit()
  </code></pre>
  
  <p>edit2: the link to the json i'm using: <a href="https://archive.scryfall.com/json/scryfall-default-cards.json" rel="nofollow noreferrer">https://archive.scryfall.com/json/scryfall-default-cards.json</a></p>