Autocomplete Field slows form down

Adding an autocomplete field slows things down significantly (both when editing the HTML form and when opening the form to enter data). Each additional autocomplete field slows the form down incrementally.

SIMPLE FORM WITHOUT AUTOCOMPELTE (OpenMRS 1.7)
WARN - HtmlFormEntryController.formBackingObject(135) |2010-12-02 07:26:18,258| Took 716 ms

SAME FORM AFTER ADDING AUTOCOMPLETE FIELD (OpenMRS 1.7)
WARN - HtmlFormEntryController.formBackingObject(135) |2010-12-02 07:28:30,581| Took 8729 ms

And

SIMPLE FORM WITHOUT AUTOCOMPELTE (OpenMRS 1.8)
WARN - HtmlFormEntryController.formBackingObject(135) |2010-12-02 15:48:08,695| Took 1607 ms

SAME FORM AFTER ADDING AUTOCOMPLETE FIELD (OpenMRS 1.8)
WARN - HtmlFormEntryController.formBackingObject(135) |2010-12-02 15:51:10,911| Took 2465 ms