WPLiveDojo doesn't use the comments wordpress table to store the data, but uses a custom database structure that has it's indexes optimized for particular purposes. Therefore it generates significantly less load to the DB Server and can serve more concurrent users that other plugins. Other plugins' database structure need to alter the indexes everytime anyone posts a comment on the site. WPLiveDojo alters the database index only when a new update is added. This means that our proficient ping time can be set lower (specially for high usage wordpress sites).