title: JavaScript clean memory
body: <p>I have a problem about memory management. 
  My simpliest code is here:</p>
  
  <pre><code>var url="/abrapo.php";
  var ob={start_:100, token:null}
  
  function post_token(){
    $.post(url,{access:ob.token})
     .done(function(data){
        console.log(data);
        ob=data;
      });
  }
  </code></pre>
  
  <p>I call function post_token every seconds. So after 2000 call user has problem of memory, ram goes up to 2GB.  I don't need to save anything just want to log data after post and clear memory. I've already googled and find delete ob. But  it does not clean the memory. What increase memory and how can I clean it without reloading the page</p>