Go's worker queue pattern:

type WorderPool struct {
  queue chan int
}

func (wp *WorkerPool) start() {
  for i := 0; i < 500; i++ {
    go funcIO {
      for id := range wp.queue {
        doSomething(id)
      }
    }()
  }
}

func (wp *WorkerPool) add(id int) {
  wp.queue <- id
}

• Go 1.20 errors.Join / multiple unwrap error
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