I was surfing the web, as usual and I wanted to take a look at [Bing](http://www.bing.com/)'s source code because I was curious and wanted to know what they were using to make their image fade in. I was surprised by what could only be qualified by the following line :

**Holy wall of text!**

And it made me wonder if there is any advantage to obfuscate your (X)HTML, CSS and JavaScript like this? To reduce the size of the file perhaps?

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Edit : After looking around, I realized this was a pretty common practice. Never looked at it from a minification point of view before!