Speed test

Page load speed:

function tr_head() {
    $GLOBALS['tr_time_start'] = microtime( true );
}
add_action( 'wp_head', 'tr_head' );

function tr_footer() {
    $start = $GLOBALS['tr_time_start'];
    $end   = microtime( true );
    
    echo sprintf( '<p>Page generated in %0.2f seconds.</p>',
        $end - $start
    );
}
add_action( 'wp_footer', 'tr_footer' );