title: Firebug Net Panel - "Request start time since beginning"
body: <p>I'm working on analyzing the performance of a web application which runs for now on localhost. For that purpose, I'm using Firebugs Net Panel. I've seen Jan's nice explanation of the Net Panel timeline - <a href="http://www.softwareishard.com/blog/firebug/firebug-net-panel-timings/" rel="nofollow">http://www.softwareishard.com/blog/firebug/firebug-net-panel-timings/</a> . I've also considered the YSlow recommendations to have the components load in the page much quicker and with a smaller file size. But it still requires quite a lot of time. </p>
  
  <p><img src="https://lh5.googleusercontent.com/-tp3dNWILRfg/Tp1nyG3nYBI/AAAAAAAAAAs/wSETC1QLvx0/s640/netpanel.png"/></p>
  
  <p>In the above image the tool tip displays that the second request was started 171-15=156 ms after the first request. </p>
  
  <blockquote>
    <p><em>+171ms Request start time since the beginning</em></p>
  </blockquote>
  
  <p>Why does it send the request that late? Is something wrong with the browser settings? As far as i know, Firefox can process 6 simultaneous requests - why doesn't it do the 5th and 6th request along the 2nd,3rd,4th request? Can i do something to improve this so that the request gets processed earlier? </p>
  
  <p>Thankx  </p>
  
  <p>Specs:</p>
  
  <p>Firefox: 6.0.2<br/>
  Firebug: 1.8.3<br/>
  server:localhost<br/><br/>
  1st request: HTML file<br/>
  2nd request: CSS file<br/>
  3rd request: JS file<br/>
  4th request: JS file<br/>
  5th request: GIF file<br/>
  6th request: PNG file<br/>
  7th request: PNG file<br/>
  8th request: JS file<br/>
  9th request: PNG file<br/>
  10th request: JSON file<br/>
  11th request: PNG file<br/></p>