Using Hyper Cache plugin. You can clear cache here: https://sudoroom.org/wp-admin/options-general.php?page=hyper-cache/options.php or configure/optimize it as necessary. 

Please report any bugs

May produce upwards of ~800% improvement in performance http://www.tutorial9.net/tutorials/web-tutorials/wordpress-caching-whats-the-best-caching-plugin/ 

And hopefully we never get slashdotted again!

// Matt