For answering your second paragraph, note that even small gains in speed have a direct effect on user engagement. Google and Amazon have noticed so: http://www.uiandus.com/blog/2009/2/4/amazon-milliseconds-mea...
For answering your second paragraph, note that even small gains in speed have a direct effect on user engagement. Google and Amazon have noticed so: http://www.uiandus.com/blog/2009/2/4/amazon-milliseconds-mea...