What is the GMP scheduler model in Go?

The GMP model is a scheduler for goroutines in Go, consisting of three main components:

• G (Goroutine) — a lightweight thread of execution launched by the program.
• M (Machine) — the system thread of the OS on which goroutines run.
• P (Processor) — a logical processor that connects goroutines with threads.

How it works:

• P manages the queue of goroutines ready to run.
• M takes a goroutine from P and executes it.
• The number of P's is limited (by default equal to the number of CPUs), which allows efficient use of system resources.

This model provides high performance and scalability, enabling the launch of thousands of goroutines with minimal overhead compared to OS threads.