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News Photo of Tanzim Saqib Tanzim Saqib is a Senior Developer, who spent half of his life on software and worked for many companies like #1 .NET controls provider Telerik Inc, #1 personalized Web 2.0 start-page like Pageflakes (acquired by LiveUniverse). He developed many projects ranging from banking solutions for Citibank, HSBC, Wamu, Wells Fargo etc. to Paperless Virtual University. He is industry's earliest and leading widget developer and as know as "Widget Master" to his peers.

He is a preacher of Microsoft technologies. While he jams with the latest additions to .NET, in his spare time he blogs at http://weblogs.asp.net/TanzimSaqib, maintains his personal website http://www.TanzimSaqib.com, leads .NET Research group. writes articles.

He is an easy going, fun loving, and passionate technology individual who is open to any kind of business opportunity and professional relationship. He currently lives in Bangladesh, but travels anywhere in the world on professional demand.

Email: me at TanzimSaqib dot com
Tanzim Saqib on .NET discovery Innovate. Create. Share.

We have seen DOM caching before and function delegation is also a kind of function caching. Take a look at the following snippet:
for(var i=0; i<count; ++i)
    $get('divContent').appendChild(elements[i]); 
As you can figure out the code is going to be something like:
var divContent = $get('divContent');
    
for(var i=0; i<count; ++i)
    divContent.appendChild(elements[i]); 
That is fine, but you can also cache browser function like appendChild. So, the ultimate optimization will be like the following:
var divContentAppendChild = $get('divContent').appendChild;
    
for(var i=0; i<count; ++i)
    divContentAppendChild(elements[i]);   
Posted on Friday, January 11, 2008 6:48 AM JavaScript , Performance | Back to top


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