I personally have not had a need to use XMLHttpRequest in my 5 years of js development, so I find it very strange that it accounts for 8% of hangs in IE. Is th

I personally have not had a need to use XMLHttpRequest in my 5 years of js development, so I find it very strange that it accounts for 8% of hangs in IE. Is there some design pattern MS devs use in javascript causing this problem? Pretty much every JS framework encourages async requests and managing deferred objects. Also, why are people still doing JS calls inline and not at the bottom of the page... or at least on domloaded? I don't think XMLHttpRequest specifically is the problem, sounds more like a multitude of poor coding practices that create blocking situations.