Looking for security / performance experts

Best performance tip - Codeigniter Caching is amazing. Even if your content changes every 10 minutes , you just put this one line in the method that is calling the views:

PHP Code:

$this->output->cache(10); 


and now any simultaneous viewers of the page - are all hitting the cached version which comes back instantly. your database is completely untouched and its resources saved for the more critical tasks.