UberMenu is built to be as efficient as possible, but once you are done designing your menu, you can optimize it even further.
If you’ve added images to your menu, this means you’re loading extra resources on your site that you wouldn’t be otherwise without UberMenu. Make sure you are loading those resources as efficiently as possible by choosing an appropriate Image Size in the Control Panel. You can also use lazy loading for submenu images (which you can enable in the Control Panel).
Learn more about Image Optimization
CSS & JS Optimization
Whether it’s UberMenu or any other module on your site, you’ll want to optimize your code when you move to production to get the fastest load times by minimizing bandwidth and HTTP server requests.
Learn more about Asset Optimization
Database Query and Processing Optimization
Whether you are using UberMenu or a standard WordPress menu, building a menu requires multiple database queries on each page load. Of course, the more menu items and queries you require of the menu, the longer it will take to assemble that information and load the menu. When designing your menu, you should make sure to use your resources efficiently (for example, don’t use Dynamic items unnecessarily).
Using caching to minimize your database queries can make your site run faster and decrease server load. Using a full featured caching solution like W3 Total Cache is a great way to speed things up.
Leveraging Menu Segment Caching is a great way to cache your submenus independently and save processing on each page load.
If you have a lot of logged in users, the WP Menu Cache plugin allows you to cache just the menu itself.
Remember, don’t keep caching plugins enabled during the development process, as they’ll prevent any changes you make from appearing immediately.
Learn more about Database and Processing Optimization
Menus Panel Performance
If you have a lot of menu items, your Appearance > Menus Panel is going to slow down (with or without UberMenu). This is due to a bottleneck in the WordPress core menu screen code. You can Increase Your Menus Panel Performance with the Faster Appearance – Menus plugin.