What is a worker pool in Go?

Can you explain what a worker pool is in Go?

A worker pool in Go is a design pattern that manages a pool of goroutines to handle tasks concurrently.

How do I implement a worker pool in my Go application?

You can implement a worker pool by creating a channel for tasks and a fixed number of goroutines that listen for tasks.

What are the benefits of using a worker pool?

Using a worker pool helps to limit resource usage, improves performance, and manages concurrency effectively.

Can you provide a simple code example of a worker pool?

Sure! Here's a basic example:

package main

import (
	"fmt"
	"sync"
)

func worker(id int, jobs <-chan int, wg *sync.WaitGroup) {
	defer wg.Done()
	for j := range jobs {
		fmt.Printf("Worker %d processing job %d\n", id, j)
	}
}

func main() {
	const numWorkers = 3
	jobs := make(chan int, 100)
	var wg sync.WaitGroup

	for w := 1; w <= numWorkers; w++ {
		wg.Add(1)
		go worker(w, jobs, &wg)
	}

	for j := 1; j <= 9; j++ {
		jobs <- j
	}
	close(jobs)
	wg.Wait()
}