The relationship between Golang coroutine and goroutine

Coroutine is an abstract concept of executing tasks concurrently, and goroutine is a lightweight thread function in the Go language that implements the concept of coroutine. The two are closely related, but goroutine resource consumption is lower and managed by the Go scheduler. Goroutine is widely used in actual combat, such as concurrently processing web requests and improving program performance.

The relationship between Golang coroutine and goroutine

Coroutine and goroutine

Coroutines are an abstract concept in concurrent programming that allow multiple tasks to be executed simultaneously in a single thread. In the Go language, a lightweight thread function called goroutine is provided, which is very similar to the concept of coroutine and can efficiently perform concurrent tasks.

goroutine

Goroutine is a lightweight independent execution unit in the Go language. It is similar to a thread, but consumes less resources. Goroutine can be created through the go keyword. The code example is as follows:

func main() {
    // 创建一个 goroutine
    go func() {
        fmt.Println("这是一个 goroutine")
    }()
}

The connection between coroutine and goroutine

The goroutine in Go language is implemented The concept of coroutines, which allows multiple tasks to be executed concurrently in a single thread. The difference between coroutine and goroutine is:

• Abstract level: Coroutine is a more abstract concept, which can be implemented by various underlying mechanisms, such as goroutine or threads .
• Resource consumption: goroutine has lower resource consumption than threads because they are managed by the Go language scheduler.
• Scheduling strategy: The Go language scheduler automatically manages the scheduling of goroutines, while the scheduling of coroutines usually requires manual control.

Practical case: Concurrent Web request processing

The following is a practical case of using goroutine to concurrently process Web requests:

package main

import (
    "fmt"
    "net/http"
)

func main() {
    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        // 创建一个 goroutine 处理请求
        go func() {
            fmt.Fprintf(w, "Hello, World!")
        }()
    })

    http.ListenAndServe(":8080", nil)
}

In this In the case, goroutine is used to process each HTTP request in parallel, improving the performance of the web server.

By using goroutines, Go programmers can easily create concurrent applications that take full advantage of multi-core CPUs without having to have a deep understanding of the underlying concurrency mechanisms.

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