How to do concurrency in golang

With the rapid development of computer technology, we have quickly entered the era of big data. Facing the rising demand for data processing and storage, many developers have begun to seek better concurrency languages, and concurrency has become one of the key areas of focus. This article will explain in detail how Golang implements concurrency.

Golang is a programming language developed by Google. It was designed from the beginning to adopt a concurrent programming mechanism. Goroutine in Golang is a lightweight thread. Multiple goroutines are created within a process and can perform tens of thousands of tasks at the same time, which improves the performance of concurrent programming in Golang. There are two ways to implement concurrency in Golang:

1. Using goroutine to implement

Goroutine in Golang is very simple to use, just add the go key before the function call Just text, for example:

func main() {
    go task1()
    go task2()
    go task3()

    time.Sleep(10 * time.Second)
}

func task1() {
    // 这里是任务1的代码
}

func task2() {
    // 这里是任务2的代码
}

func task3() {
    // 这里是任务3的代码
}

In the above code, we created three goroutines, and executed these three tasks concurrently during the task execution of the main thread. It should be noted that if time.Sleep is not added, the main thread is likely to end before the three tasks are completed, resulting in the task not being completed.

2. Use channel to implement

The channel in Golang is a special data type and is the connection channel between goroutines. Communication and synchronization between goroutines can be achieved through channels, and mutually exclusive access to resources can also be achieved. To implement concurrency in Golang, the following is a code example using channels:

func main() {
    ch := make(chan int)

    go worker(ch)
    go worker(ch)
    go worker(ch)

    for i := 0; i < 3; i++ {
        <-ch
    }
}

func worker(ch chan int) {
    // 这里是任务执行过程
    ch <- 1
}

In the above code, we create a channel and use the go keyword to perform the same task in three goroutines. After the task in each goroutine is executed, the main thread is notified that the task has been completed through channel communication.

Summary

By using goroutine and channel to implement concurrent programming, the processing power and data processing speed of the program can be effectively improved. The Golang language has natural advantages in concurrent programming and is worthy of in-depth study and research by developers.

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