Sunday, January 13, 2008 1:33 AM
TanzimSaqib
ASP.NET AJAX Best Practices: Introduce function delegates
Take a look at the following loop. This loop calls a function in each iteration and the function does some stuffs. Can you think of any performance improvement idea?
for(var i=0; i<count; ++i)
processElement(elements
);
Well, for sufficiently large array, function delegates may result in significant performance improvement to the loop.
var delegate = processElement;
for(var i=0; i<count; ++i)
delegate(elements);
The reason behind performance improvement is, JavaScript interpreter will use the function as local variable and will not lookup in its scope chain for the function body in each iteration.
Filed Under:
JavaScript,
AJAX,
Performance
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About TanzimSaqib
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