Use Go language to develop powerful stress testing tool functions

Use Go language to develop powerful stress testing tool functions

With the continuous development of Internet applications, the performance testing of websites and services is becoming more and more important. Stress testing is an important means in performance testing, which tests the stability and performance of the system by simulating a large number of user accesses. As an efficient programming language, Go language provides a wealth of libraries and tools that can easily develop powerful stress testing tools.

In this article, we will introduce how to use the Go language to develop a simple but powerful stress testing tool, including functions such as sending concurrent requests, recording response times, and statistical results. Let's take a look at specific code examples.

First, we need to create a Go language project and import the required libraries. We can use go mod to manage project dependencies to ensure that we can easily introduce third-party libraries. Create a go.mod file in the root directory of the project with the following content:

module pressure-test-tool

go 1.17

require (
    github.com/go-resty/resty/v2 v2.7.0
)

Here we introduce the go-resty library for sending HTTP requests. Next, we started writing code to implement the functions of the stress testing tool.

First, we create a main.go file for writing the code of the main program.

package main

import (
    "fmt"
    "sync"
    "time"

    "github.com/go-resty/resty/v2"
)

func main() {
    url := "http://example.com" // 测试目标网站地址
    totalRequests := 1000       // 总请求次数
    concurrency := 100          // 并发数

    respTimes := make([]time.Duration, totalRequests)
    var wg sync.WaitGroup
    client := resty.New()

    start := time.Now()
    for i := 0; i < totalRequests; i++ {
        wg.Add(1)
        go func(index int) {
            defer wg.Done()
            startTime := time.Now()
            _, err := client.R().Get(url)
            if err != nil {
                fmt.Println("Request error:", err)
                return
            }
            respTimes[index] = time.Since(startTime)
        }(i)
        if i%concurrency == 0 {
            time.Sleep(1 * time.Second)
        }
    }

    wg.Wait()
    elapsed := time.Since(start)

    fmt.Println("Total requests:", totalRequests)
    fmt.Println("Concurrency:", concurrency)
    fmt.Println("Avg response time:", calculateAvgResponseTime(respTimes))
    fmt.Println("Total time taken:", elapsed)
}

func calculateAvgResponseTime(respTimes []time.Duration) time.Duration {
    sum := time.Duration(0)
    for _, respTime := range respTimes {
        sum += respTime
    }
    return sum / time.Duration(len(respTimes))
}

The above code implements a simple stress testing tool. It will send a certain number of concurrent requests to the specified website address, record the response time of each request, and calculate the average response time and total consumption. hour. We can adjust the totalRequests and concurrency parameters according to actual needs to control the scale of the test.

In addition to sending GET requests, we can also use Post, Put and other methods to test different types of requests. In addition, we can also expand the functions of the tool, such as adding report generation, performance chart display, etc., to make the stress testing tool more comprehensive and practical.

In short, developing stress testing tools using Go language is an interesting and challenging task. Through the above sample code, we can quickly understand how to use the Go language to implement a simple but powerful stress testing tool. I hope this article can be helpful to you. Everyone is welcome to try and further optimize this stress testing tool to make it more complete and practical.

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