title: CasperJS simultaneous requests
body: <p>Lets say I have an array of urls. I dont want to use thenOpen function . Since it waits for every previous url to be loaded and it decreases load time .</p>
  
  <pre><code> casper.each(hrefs,function(self,href){
        self.thenOpen(href,function(){ });
        self.then(function(){
          //  Selectors
       });
  </code></pre>
  
  <p>});</p>
  
  <p>What methods would u use to spend much less compared to above method ?  Would it be efficient to create multiple instances store in the db and then fetch ... but this is alot of headache . And also would like u also to answer in general would I have problems when I run multiple instances of the same js file simultaneously ?</p>