Comment 4 for bug 948820

a lot of this is bug 938584

we could also add a maximum string length limitation (because larger searches take longer to complete)

the hud UI could also refuse to submit a new search while one is still in progress to prevent the stacking effect (that causes it to take 10 minutes for the CPU to clear up). another possibility is that it will only submit a search after the user has stopped typing for a short interval (100-200ms?)