function whyAreYouDoingThis (string $tmplName, array $params) {
    static $twig = null;
    if ($twig === null) {
        $loader = new Twig_Loader_Filesystem('/path/to/templates');
        $twig = new Twig_Environment($loader, array(
            'cache' => '/path/to/compilation_cache',
        ));
    }

    echo $twig->render($tmplName, $params);
}