As QMaster points out Nim `spawn` will deeply copy the element. That being said it's not a great idea to have a table with strings in a shared structure. Those strings will be owned by whichever thread created them, and the thread might free that memory if it finds it is no longer in use (in that thread).
That being said if you compile with `--gc:arc` your example works as you expect. With the new ARC GC we are allowed to share memory between threads like this and as such those `spawn` calls doesn't deep copy the memory. There's also no issue of sharing the string keys under ARC. However as @boia01 pointed out you're not guaranteed to always get 1000, and I don't think you are guaranteed that in the Go version either. Since your threads to so little work it is probably most likely to happen that way, but it's not guaranteed.
