How to kill process created by Stockfish()?

[pronode]

When you execute Stockfish() it creates an instance of something (engine I guess?) that sits in memory until the main process is killed. Is it possible to kill that thing someway without killing main thread?

I'm running stockfish.wasm on Node.JS server.

[niklasf]

Unfortunately I don't know a clean way. It's possible to call sf.terminate() given sf is an instance, but it does not work reliably:

https://github.com/lichess-org/lila/blob/5d26cf97458fa3772d21dee65a61d217058e617b/ui/ceval/src/worker.ts#L204-L206

[pronode]

It's possible to call sf.terminate() given sf is an instance, but it does not work reliably

Yes, it does nothing.
The workaround is to encapsulate everything in separate worker process and kill that worker when it's needed.