there could be a variety of things slowing your site down. I usually start troubleshooting with the theme:
- Change to a default theme (TwentyEleven, TwentyTwelve) and see if it gets faster
- Try running Google PageSpeed tools
- In Firefox or Chrome, open the developer tools (F12) and change to the Network tab (Chrome) or Net tab (Firefox)… watch for slow-loading javascripts or images. Also check for errors while you’re here.
- Install a caching plugin like BWP Minify
- Check out the WP Debug Bar for some query information
I have never had ACF slow my site down on its own, and I have made sites with dozens of custom fields. Let us know what you find!
