Speed of query using search

on site whatshappeningtoday.com I have 12 CPT including the regular Event post type.

When I select a category of CPT from the dropdown menu and move to the search for text field it is taking a long time for the Category type to resolve. Thus, I have already typed in my “search for” information and then… the Category resolved deleting the “search for” criteria

Then, searching for the “search for” criteria, for example Category “Bowling Alley” and search for “Gold County Lanes it is taking several seconds. And this is on a work station devise.

When trying to add an event the lag time to display the form is many seconds. Very slow.

Then, when clicking on Begin Search there is another few second delay. What can I do to make the search blazing fast.

I am already on a dedicated server with 16gb ram

Kind regards and thank you for your assistance.