What can I do with the new pool? Can I add a task after starting?

In Go, a new pool (for example, a pool of goroutines or workers) is usually created with a fixed number of workers that process tasks from a queue. After starting the pool, you can add new tasks if the pool is implemented with a task queue. That is, you place tasks into a channel or queue, and the workers pick them up and execute.

If the pool is implemented without a queue or with limitations, adding tasks after startup may be impossible or require additional synchronization.

An example using a task channel:

jobs := make(chan Job)

func worker(id int, jobs <-chan Job) {
    for job := range jobs {
        // process job
    }
}

// start the pool
for w := 1; w <= numWorkers; w++ {
    go worker(w, jobs)
}

// add tasks
jobs <- newJob

Thus, after starting the pool, you can add tasks to the jobs channel.