Inside the Go Scheduler: How GMP Model Powers Millions of Goroutines

Introduction A common question developers ask when learning Go is: "Why goroutines when threads already work?" Take Java, for example—each client request is executed on an OS thread. Simple, straightforward, and battle-tested. So why did Go introduce this additional abstraction? The answer lies in scalability and efficiency. While OS threads are powerful, they're also heavyweight—creating thousands of them can overwhelm a system. Goroutines, on the other hand, are lightweight and mana