We already done that, optimize out certain things into primitives, which are implemented in C++. We support as subset of the MRI extension API, mainly we don't

We already done that, optimize out certain things into primitives, which are implemented in C++. We support as subset of the MRI extension API, mainly we don't support anything using RBASIC(), RHASH(), or RREGXP() because those expose raw C data structures and we don't use the same data structures as MRI.