Hi Dee Kitty,
that’s strange. In my installation (v1.8beta) I have 22K posts in 27 categories. Results in less than one second and no difference between searches. I expect that limiting the search to one category to be a bit slower because of the additional condition in the SQL-command.
Can you give us more information? Version of MlF, PHP, server…
Alfie (Helmut Schütz)