When typing a formula in to the FormulaBuilderDialog it is painstakingly slow. For each character typed it will freeze for several seconds making it a not so fun experience. Anyone seen this before or know of any causes?
I'm afraid I have no explaination for that. It works fine on mymachine with the same version. Perhaps you need to get the latest Hot Fix:
My Infragistics Keys and Downloads - Download Anything and Everything You Own
If that doesn't help, you should Submit an incident to Infragistics Developer Support. Maybe they know of an issue that I am not aware of.
Windows XP SP2 and Version 8.1.20081.100.
I just went and double checked it seemed more responsive than last week but if I typed a formula at normal pace there was some serious lag and the formula wouldn't appear on screen until much more than several seconds after I finished typing.
No, that's never happened to me before and I've never heard of it happening. The FormulaBuilder actually uses a timer to allow the UI to remain active while you type and only compile the formula when there is a pause, so what you are describing doesn't seem possible.
What version of the controls are you using?
What operating system are you running?