wp-plugins/wordfence — pull request #3 by HeikoOT (2014-11-30 11:54:25+00:00)
Title: added "wp" hook to start output buffering

For my wordpress installation I use a output buffering plugin to compress the generated output. With the made changes additional output filters can be added, even before the output gets cached by wordfence.

For example:
function buffer_start() {
ob_start( 'buffer_callback' );
}
add_action( 'wp', 'buffer_start', 100 );