[rattray]

Ruby is phenomenally easy to write. This post essentially describes a way to make Ruby less slow, which would reduce the incentive to leave the language.

Once they port all Rails libraries to Rust, you can still use the extremely-ergonomic Ruby programming language, but it won't be "slow as hell" anymore. And ruby performance is "tolerable in most circumstances" as-is.

I certainly agree that it could be awesome to have Rust on Rails for those who would find even Rails on Rust performance intolerable, and Iron's abstractions inadequate.

[brightball]

This is the exact reason I'm headlong into Elixir and Phoenix right now. It's like the best of both worlds.