This code is a plugin to allow enable lazy loading on MetaSlider. It is worth reading the comments in the Gist for more details on how to use this code. Add this code to a file located here: wp-content/mu-plugins/metaslider-dynamic-loading.php. You should also update the IDs in the code to include the slideshows you want to use.
We hope that this code will be useful, but do not make guarantees. If you need troubleshooting help, or modifications to this code, please contact MetaSlider Pro support.