通过AJAX缓慢加载内容

I have modal box in which I add content to this box via AJAX ( data from database ), but here is a problem. This content is loaded very slowly. It happened that i open modal and after 4 or 5 sec appears a content.

I set content like this :

$("#someIdInModal").html(""+dataFromDatabase);

So how you think where is problem ? I need to buy better server? xD or there is some faster method than this?