Comment by lylecubed

Nim has multiple garbage collectors you can change at compile time. Here's the --gc option from the documentation.

    --gc:refc|v2|markAndSweep|boehm|go|none|regions

I don't know if this is up to date or not. There's an open issue on github to improve the documentation on the garbage collector.

https://github.com/nim-lang/Nim/issues/8802