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Comment by bullen | Hacker News Reader

Only C++ and Java(C#) can share memory between threads. If you are going to compare things you probably should understand that and design the test so that it shows the difference. If the application is so simple it can scale on different machines, the performance doesn't really matter.

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Am I misunderstanding what you mean?

C#, F#, Go, and Rust can share memory between threads. Those are just ones on the list I am sure about.

C# can, it's design is copied from Java. Go and Rust can't share memory natively, they need to copy data.

So you probably should not make "games with go".

Go prefers message passing of copies using channels, but absolutely does permit shared state if you want it. I've written multithreaded code with shared state in Go myself. You just need to pass a pointer to the state across a channel, and can then control access using synchronisation primitives such as mutexes in exactly the same way you would in Java or C.

Obviously Rust can share memory between threads. Just see the docs for mutex as an example:

https://doc.rust-lang.org/std/sync/struct.Mutex.html

This comment is terribly misinformed. You absolutely can share memory between threads in Rust and can do it without race conditions (eg Arc pointers and Mutex).

Go has a built in message passing system in the language but you can share memory between goroutines without friction, and you can lock goroutines to real os threads if you want, too. I did both in my gameswithgo stream. It was a fun time!

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