Subj : Re: JS spead in UI thread? To : netscape.public.mozilla.jseng From : Peter Wilson Date : Mon Feb 21 2005 07:48 am Thanks for the reply. In converting to run in threaded code I copied the input to a JS variable - this was the sole cause of the speed up.. The original made repeated access to a UI text field value. The slowdown was entirely due to the XBL access overhead. The amended version now runs in the same 0.5 seconds. I was unaware that access to UI widget properties was so expensive. Sorry for the false alarm. .