title: Slow performance of POS tagging. Can I do some kind of pre-warming?
body: <p>I am using NLTK to POS-tag hundereds of tweets in a web request. As you know, Django instantiates a request handler for each request.</p>
  
  <p>I noticed this: for a request (~200 tweets), the first tweet needs ~18 seconds to tag, while all subsequent tweets need ~120 milliseconds to tag. What can I do to speed up the process? </p>
  
  <p>Can I do a "pre-warming request" so that the module data is already loaded for each request?</p>
  
  <pre><code>class MyRequestHandler(BaseHandler):
      def read(self, request): #this runs for a GET request
          #...in a loop:
              tokens = nltk.word_tokenize( tweet)
              tagged = nltk.pos_tag( tokens)
  </code></pre>