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Reduce the Number of Plugins You Use
Another way to speed up your WordPress site is to reduce the number of plugins you’re using. Every plugin you add has to be loaded, which can slow down your page loading time. When you’re choosing plugins, look for ones that are lightweight and well-coded.
Also, make sure you only use plugins that are essential for your site. If you’re not sure if you need a plugin, ask yourself if there’s another way to achieve the same functionality without one. For example, if you want to add a social sharing button to your posts, see if your theme already has that functionality built-in.