cleaning databases, optimizing existing code, upgrading to the latest versions and adding some sort of caching mechanism, where the script does not need to generate a new page with every request, helps to lower the over load that a script will cause
I need to know which database you are using either Sql Server or Access or any other. I will optimize the database if it is not as per my knowledge in that database.
I need to understand how new pages are loading with changes in database.