Benchmark sobre Twig el nuevo motor de templates para PHP

Library	Time (sec)	Memory (Ko)	Templates rendered per second
Twig	3	1,190	3,333
PHPTAL	3.8	2,100	2,632
Dwoo	6.9	1,870	1,449
Smarty 2	12.9	2,350	775
Smarty 3	14.9	3,230	671
Calypso	34.3	620	292
eZ Templates	53	5,850	189

Mas info:
http://fabien.potencier.org/article/34/templating-engines-in-php