Why doesn't Ruby have a ThreadPool built-in?

Question

I have a program that creates 10000 threads at once, and runs 8 at the same time.

But ruby doesn\'t have a ThreadPool built-in as Java. Is there a good reason?

Answer 1

Most likely the reason is because ruby doesn't have "real" threads. It has what are called Green threads. The ruby interpreter takes care of scheduling execution threads without using any underlying OS threads. This effectively makes Ruby single threaded.