Hi. We have a performance issue with the  keyup handler that is
attached to a textarea control using $addHandler  when the page loads.

Every time the user presses a key in textarea, DomEvent object is
built and for some reason getLocation method gets called. This method
is rather slow and typing in this textbox lags considerabley because
of this if you typoe fast enough.

Why would getLocation be called for a keyboard event and how do we
turn it off?