We've generally moved to a model where `InstanceHandle` doesn't hold ownership of its internals, instead relying on the caller to manage that. This removes an allocation on the `Func::wrap` path but otherwise shouldn't have much impact.
This is the wasmtime-runtime crate, which contains wasm runtime library
support, supporting the wasm ABI used by wasmtime-environ,
wasmtime-jit, and wasmtime-obj.
This crate does not make a host vs. target distinction; it is meant to be compiled for the target.
Most users will want to use the main wasmtime crate instead of using this
crate directly.