Thanks for the link, I haven't seen that plugin before. We use a plugin I wrote (http://github.com/elektronaut/dynamic_image/ http://github.com/elektronaut/dyn

Thanks for the link, I haven't seen that plugin before. We use a plugin I wrote (http://github.com/elektronaut/dynamic_image/ http://github.com/elektronaut/dynamic_image/), which seems to be based on similar ideas on syntax. For caching we just do regular page caching, with no expiration. Since the request doesn't have to hit the backend at all (except for the first view), this is pretty damn fast.