Evan You just announced the first public preview of Vue 2:
Vue has always focused on staying light and fast, but 2.0 pushes it even further. The rendering layer is now based on a lightweight virtual-DOM implementation that improves initial rendering speed and memory consumption by up to 2~4x in most scenarios (check out these benchmarks). The template-to-virtual-DOM compiler and the runtime can be separated, so you can pre-compile templates and ship your app with only the runtime, which is less than 12kb min+gzip (as a reference, React 15 is 44kb min+gzip). The compiler also works in the browser, which means you can still drop in one script tag and start hacking, just like before. Even with the compiler included, the build is sitting at 17kb min+gzip, still lighter than the current 1.0 build.