how to increase jquery performance in asp.net

1)       USE CDN

By taking advantage of the CDN, you can significantly improve the performance of your Ajax   applications. The contents of the CDN are cached on servers located around the world. In addition, the CDN enables browsers to reuse cached third party JavaScript files for web sites that are located in different domains. Google, Microsoft and  Jquery provide the CDN

2)      Use Ids instead of Class

It's much better to select objects by ID because of the library's behavior: jQuery uses the browser's native method, getElementByID(), to retrieve the object, resulting in a very fast query.

By class  traversing the whole DOM

In Asp.net we have  find  the control three ways

You can use a wild card CSS selector

The above line matches all HTML input elements with an ID attribute that ends with "TextBox". It will match:

$(document).ready(function () {

     //write your code here

     var  txt =$('input[id$=TextBox1]').val();

     var txt1= $('#' + '<%=TextBox1.ClientID %>').val(); //this is better 

    var txt2=$("[id$=_ TextBox1]").val();

});

In this example we have use find the control by id but Also realize that doing attribute selector searches are fairly slow (but then ‘slow’ is relative). If you have very large documents with lots of elements and you’re doing many look ups using this function, you may run into performance issues. 

3)      Use Latest Jquery  Version

jQuery is in constant development and improvement.  Jquery Team are always researching new ways to improve program performances. So We have to use the latest version

4)      Minify Scripts  and css

Browser are  not unable  to process more then one script concurrently  So they queue then up  And lots of script increase the   page load time. So Always use minified scipts  

5)      For And For each Loop

http://jsperf.com/jquery-each-vs-for-loop/6

tested in my solution that the same block of code using for is most of the times faster than each. So means native function much faster as compared to helper function

so for loop is better

6)      Others

           Dom manipulation should be limited,

            Concatenation should be limited

            use  join comma separated list