Code completion has become quite slow under Delphi7

http://www.delphigroups.info/2/7/745746.html

 

I think you can affect it by following this menu trail...
Tools
Environment Options
Preference
Check Project Desktop
Check Desktop and Symbols

Quote

Code completion has become quite slow under Delphi 7 (ctrl+space
and parameter hints), under Delphi 5 it was slow only for the first
time code completion was invoked, but all subsequent code completions
were instantaneous. On Delphi 7 however, it is just as slow each time
(project and libraries are huge).

Any hint to speeding things back up?

Eric