UI responsiveness and javascript

Question

I have a large set of data to be plotted on google map. Because of the data set size, google map always freezes for a few seconds before all the points are plotted. I used a

Answer 1

Javascript might not support multiple threads normally, but you can achieve the effect.

function spawnThread(func, params){
   window.setTimeout(
      (function(f, p){
        return function(){
          f.call(p);
        }
      )(func, params), 0
   )
 }

The main problem with this method would, of course, be checking on the success of the thread, I assume you could manage this using a global variable or something similar, wouldn't be a great solution, but it would work.