> But that's basically an emulator of a VM, isn't it? It's like rewriting the Flash AVM2 into JS... it's still running in JS whereas the original VM was C++. I

> But that's basically an emulator of a VM, isn't it? It's like rewriting the Flash AVM2 into JS... it's still running in JS whereas the original VM was C++. I think you're using a different definition of the term VM than most other people here. An "emulated VM" is a VM too. > one major purpose of a VM is to improve performance over what's available in the browser. That's definitely a very nonstandard interpretation. Many VMs are, intentionally, much less capable (in a permissions sense; in a computational sense, they're almost always exactly as capable) than the host environment they run in.