Tell me about the Go scheduler (MPG model, work stealing, handoff, etc.)

The Go scheduler is based on the MPG model (M — Machine, P — Processor, G — Goroutine):

• G (Goroutine) — a lightweight thread of execution.
• P (Processor) — a logical processor that connects G and M.
• M (Machine) — a system thread of the OS that executes code.

In Go, there is a fixed number of P, which limits the number of goroutines that can run simultaneously at the OS thread level.

Work Stealing — a load balancing mechanism where a P with less load 'steals' goroutines from other P's to evenly distribute tasks.

Handoff — transferring a goroutine from one P to another without placing it in a global queue, reducing latency.

Thus, the scheduler efficiently manages a large number of goroutines on a limited number of OS threads, ensuring high performance and scalability.