This. Exactly this. Garbage collection has a huge, and generally entirely unappreciated win when it comes to threaded code. As with most things, there are tr

This. Exactly this. Garbage collection has a huge, and generally entirely unappreciated win when it comes to threaded code. As with most things, there are tradeoffs, but every reference counting implementation that I've used has turned any concurrent access to shared memory into a huge bottleneck.