Buffered vs Unbuffered channel behavior in golang

chantest.go

package main

import (
	"fmt"
	"sync"
	"time"
)

func main() {
	// Bufferered channel.  Remove the 50 to see how an unbuffered channel behaves differently
	jobs := make(chan int, 5)
	jobsToo := make(chan int, 5)

	var wg sync.WaitGroup

	go func() {
		defer wg.Done()

		for event := range jobs {
			fmt.Println("\treceived:", event)
			time.Sleep(200 * time.Millisecond)
			fmt.Printf("\tprocessed: %d\tqueue: %d\n", event, len(jobs))
		}
		fmt.Println("No more jobs in the queue, queue has been closed.")
	}()

	go func() {
		defer wg.Done()

		for event := range jobsToo {
			// fmt.Println("\treceived:", event)
			time.Sleep(20 * time.Millisecond)
			fmt.Printf("\tJOBS2 processed: %d\tqueue: %d\n", event, len(jobs))
		}
		fmt.Println("No more jobs in the JOBS2 queue, queue has been closed.")
	}()

	wg.Add(2)

	for i := 1; i < 10; i++ {
		jobs <- i
		jobsToo <- i
		fmt.Printf("val: %d\tq: %d\n", i, len(jobs))
		time.Sleep(10 * time.Millisecond)
	}

	close(jobs)
	close(jobsToo)

	wg.Wait()
}