title: performance about url.parse in Nodejs
body: <p>I just traced my nodejs server's performance by using: <code>siege -b -t10s -q http://mynodejsserver</code></p>
  
  <p>I found that when there was no "url.parse(req.url)"</p>
  
  <p>Transaction rate was about 4300 trans/sec</p>
  
  <p>but when i used url.parse, transaction rate was about 3600-3700 trans/sec</p>
  
  <p>The other code is the same.</p>
  
  <p>I tried them many times, and the result was stable.</p>
  
  <p>Does the url.parse really have the performance problem?</p>