[WP] - Display DB queries, time spent and memory consumption

gistfile1.aw

// http://wpsnipp.com/index.php/functions-php/display-db-queries-time-spent-and-memory-consumption/

function performance( $visible = false ) {
    $stat = sprintf(  '%d queries in %.3f seconds, using %.2fMB memory',
        get_num_queries(),
        timer_stop( 0, 3 ),
        memory_get_peak_usage() / 1024 / 1024
        );
    echo $visible ? $stat : "<!-- {$stat} -->" ;
}
add_action( 'wp_footer', 'performance', 20 );