The WordPress CRON or WP-cron scheduled job can put a serious amount of load on a busy WordPress site.
From a performance perspective we strongly recommend you use a scheduled server based CRON job instead of the default WP-CRON.
The WPAlpha hosting platform provides one click setup of a server scheduled cron job.
In the video below we walk through how to configure that server cron job and also how to test it to ensure its working correctly.