Disabling the WordPress cron can improve performance of your WordPress website.
How to disable WordPress cron
In the root of the WordPress install directory, there is a wp-config.php file. Open this in your favourite editor.
Add the following line just before the line that says ‘Thats all, stop editing, happy blogging’.
define('DISABLE_WP_CRON', true);The WordPress cron will no longer be triggered when someone visits your site.
You can still manually trigger the WordPress cron.