Show HN: Koffi – low-overhead Node.js to C FFI
npmjs.com1 pointsby Koromix0 comments
int process_handle = spawn("/bin/true", SP_PAUSED); // create process but don't execute, and return a handle
// most API would take a process handle, thus you could do stuff (such as prctl) on the new process
unpause(process_handle);
Benchmarks are here: https://koffi.dev/benchmarks
It's still a little different because in my case, the instructions tend to do two things: decode JS value and prepare register/stack. For typical functions, only a few instructions have to run, with minimal overhead. So, for example, I have a PushBool instruction which calls napi_get_value_bool() and then puts the bool at the correct offset (pre-computed) so that it ends up in a register or on the stack.
A function like int atoi(const char *) ends up with only two bytecode instructions:
Or another exemple, void *memset(void *ptr, int value, size_t size) only needs four instructions:
I've coupled that with a tail-call direct-threaded interpreter, with Clang's __attribute__((preserve_none)) ABI, just like Python did recently: https://github.com/python/cpython/issues/128563