Open wp-config.php located in your WordPress root directory and add the following code:
define('AUTOSAVE_INTERVAL', 300 ); // seconds
define('WP_POST_REVISIONS', false );This code will disable all future revisions to be saved and it will also increase your autosave interval from 60 seconds to 300 seconds, so it means your post will be autosaving every 5 minute instead of every minute.
