title: CoreNLP runs too slow
body: <p>I intend to use Corenlp to annotate some amazon reviews, however, I wait for over 6 hours, nothing output is produced. </p>
  
  <pre><code> 1. the review is about 1MB;
   2. the cluster has 12CPU, 64G memory;
   3. the command is 
   java -cp "*" -Xmx64g edu.stanford.nlp.pipeline.StanfordCoreNLP -annotators tokenize,ssplit,pos,ner,sentiment -outputFormat json  -file amazon_apple_comments_4.csv
  </code></pre>
  
  <p>What has happened? is it so slow?</p>