Multiple Ajax requests for same URL

Question

I make asynchronous call for same URL for multiple times, But the response came as sequentially. Please see the attached image, The request has been started only after first

Answer 1

Generally browsers will have a limit to how many concurrent requests they will serve to a particular hostname, in the old days this was 2, but most browsers have now raised this. Defining a proxy can also affect these limits in some browsers. Again these are enforced client-side. However it should be more than one in any case. It may be possible that Firebug is also reducing the limit, check about about:config for concurrent configurations.

Are you sure you are not waiting until the callback is executed before launching the next request as given you only have one I suspect this what is really happening?