There's no overhead in caling a C api nor in other code calling Rust code as if it were a C api. There's FFI setup and some caveats both ways but a lot of the l

There's no overhead in caling a C api nor in other code calling Rust code as if it were a C api. There's FFI setup and some caveats both ways but a lot of the larger Rust projects involve (e.g Servo, Piston) interfacing with pre-existing C libraries.