https://100go.co/56-concurrency-faster/ - Use of Semaphores

[myrachanto]

Use of Semaphores

First of all, let me say that this is amazing work correcting 100 Golang code mistakes while writing clean code. Thank you for your hard work. I am learning a lot.

Second, it is not an issue just an observation - wouldn't semaphores be the best solution for making concurrency more productive? The solution is to teach the best there is to teach about Golang right?

`const max = 2048 // Defines the threshold

func parallelMergesortV2(s []int) {

if len(s) <= 1 {

    return

}



if len(s) <= max {

    sequentialMergesort(s) // Calls our initial sequential version

} else { // If bigger than the threshold, keeps the parallel version

    middle := len(s) / 2



    var wg sync.WaitGroup

    wg.Add(2)



    go func() {

        defer wg.Done()

        parallelMergesortV2(s[:middle])

    }()



    go func() {

        defer wg.Done()

        parallelMergesortV2(s[middle:])

    }()



    wg.Wait()

    merge(s, middle)

}

}`

Solution
I would recommend the use of semaphores

One or multiple solutions to avoid the mistake.