Why are goroutines more efficient than operating system threads?

Goroutines are more efficient than OS threads for several reasons:

• Lightweight: Goroutines occupy much less memory (usually a few kilobytes of stack), whereas OS threads require significantly more resources.
• Language-level scheduler: Go has its own goroutine scheduler that efficiently distributes their execution across available OS threads, allowing quick switching between goroutines without system call overhead.
• Fast creation and destruction: Creating and terminating a goroutine is much faster than an OS thread.
• Less overhead for context switching: Switching between goroutines occurs in user space, which is much cheaper than switching between OS threads.

As a result, goroutines enable efficient utilization of multithreading and parallelism with lower overhead.