http://www.symfony-project.com/forum/index.php/t/2272/
I think these performance problems are somewhat php related.
I remember doing a test like this with a couple of other php frameworks like cakephp and prado. Symfony performed among the best.

ｼﾞｬﾝｺﾞ＞RoR＞symfony＞他のPHPフレームワーク

どう見てもsymfony is kingです
どうもありがとうございました