I’ve just released Twig 1.4.0 RC2.
Like RC1, it focuses on performance with some nice tweaks. The biggest change is that Twig now comes with an optional C extension that you can install to enhance the runtime performance of Twig templates (it overrides the
Twig_Template::getAttribute() method by a C implementation).
Please try out this release candidate on your current projects; and be sure to report any regressions or bugs before we mark this release as stable.