Hi David!
Thanks for reaching out to us! 🙂
I’m sorry you are experiencing performance issues. I’ve been there myself and they are difficult to tackle.
We have a great article that will get you started on Performance Considerations you should know about. After that, if you decide to implement a caching system then you can move to these articles: Caching: What, when and how and Caching month view HTML in transients
Finally, there is a good article George put up here that groups a set of developer plugins. It’s a bit more technical than the others but will definitely be of help if you are into development.
I hope that helps! Let me know if you have any other questions and I’ll be happy to help.
Best!
Victor