Currently XMLHttpRequest Level 2 suggests 350ms +- 200ms as the interval for progress events. This was simply copied from what was specified for <video>. It has been pointed out that for XMLHttpRequest the use cases are a bit different so that 50ms or 100ms might be more desirable. (With 50ms you'd get 20fps ideally.)
I think I'll change 350ms +- 200ms to simply 50ms as the recommended interval (or for every byte, whichever is _least_ frequent, blah blah). Anyone who'd like something else?
-- Anne van Kesteren <http://annevankesteren.nl/> <http://www.opera.com/>
