AJAX requests Synchronous Vs Asynchronous -

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Is there any difference between performance (moving) between synchronous requests and asynchronous requests?

What are the reasons for using asynchronous request ??

You should always use an asynchronous Ajax request. In fact, I only have one place I know where a synchronous Ajax request should be used that if you are in Ajax Request then the client is embedding a new javascript file and then referencing references and / or objects from that JavaScript file in context. Awareness is the basic Ajax request the use of a synchronous Ajax request to bring new JS file ... either should always use asynchronous Ajax requests. The most important reason is that a synchronous Ajax request makes the UI unresponsive ...


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