Per their introduction video they advertise it as lightweight as the runtime "only" uses 180MB of memory at startup. This makes GTK and QT look lightweight in

Per their introduction video they advertise it as lightweight as the runtime "only" uses 180MB of memory at startup. This makes GTK and QT look lightweight in comparison, not to mention FLTK, a 3D enabled, platform independent toolkit, which fits in a statically linkable 300kB library. Of course, these require C++, and the point of those frameworks is to enable web developers to become application developers. One can't expect resource efficiency when everything has to run on top of a web browser.