Another commenter has a legitimate use case for a synchronous XHR: http://news.ycombinator.com/item?id=2846258 http://news.ycombinator.com/item?id=2846258 Rega

Another commenter has a legitimate use case for a synchronous XHR: http://news.ycombinator.com/item?id=2846258 http://news.ycombinator.com/item?id=2846258 Regarding bottom on page, domloaded event etc. - that does not change anything, the js is still executed synchronously.