What is Ruty?
Ruty is a sandboxed, django/jinja like template engine with template inheritance support. It's completely sandboxed so template designers won't be able to screw things up or execute code which is not meant to be executed.
How fast is it?
Ruty is slower than ERB but much faster then liquid. If we have time we will probably create a working benchmark. But usually you won't have problems with the performance since the acutal template rendering is the smallest part of the request delivery process.
What does it look like?
This webpage is generated of Ruty templates. On each page you see a link in the footer to show the sourcecode. For more examples you can head over to the documentation.