Какое отличие между процессами, потоками выполнения и виртуальными потоками Green Threads?

Processes are independent instances of programs with their own address space and operating system resources. They are isolated from each other.

Threads are lightweight units within a process that share the process's memory and resources but have their own stack and registers. Threads allow multiple tasks to be executed concurrently within a single process.

Green Threads are user-space implemented threads, managed by the language runtime or library, and can be more lightweight than system threads, allowing the creation of thousands of such threads with lower overhead.

In Go, for example, goroutines are an implementation of green threads, scheduled by the Go runtime, and efficiently utilize system threads.