Automated solution for Go language performance testing

Go language automated performance testing solution: using Vegeta and GoConvey framework. The solution consists of the following steps: Use Vegeta to create an attack or load test. Use GoConvey for BDD testing to verify that the server response is 200 OK. Use Vegeta's Histogram to measure whether request latency is less than 500 milliseconds with a 95% probability.

Automated solution for Go language performance testing

Introduction

Performance testing is important to ensure that the code performs under high load Stability and responsiveness are crucial. As the Go language continues to grow in size and complexity, automated performance testing becomes even more important. This article will introduce how to use Go language to implement automated performance testing.

Tools

• [GoConvey](https://github.com/smartystreets/goconvey): A fast, readable and extensible BDD testing framework.
• [Vegeta](https://github.com/tsenart/vegeta): A tool that can generate attacks or load tests to measure the performance of a server.

Practical Case

Let’s build a simple HTTP server and performance test it using Vegeta and GoConvey.

Server code

// server.go

package main

import (
    "fmt"
    "net/http"
)

func main() {
    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        fmt.Fprintf(w, "Hello, World!")
    })

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

Test code

// test.go

package main

import (
    "fmt"
    "testing"
    "time"

    . "github.com/smartystreets/goconvey/convey"
    "github.com/tsenart/vegeta/lib"
)

func TestHTTPServer(t *testing.T) {
    go main()

    Convey("The HTTP server should", t, func() {
        targeter := vegeta.NewStaticTargeter(vegeta.Target{"localhost:8080", "http"})
        attack := vegeta.Config{
            Targets:     targeter,
            Rate:        30,
            Duration:    10 * time.Second,
            Connections: 20,
        }
        results := vegeta.Attack(attack)

        Convey("respond with 200 OK", func() {
            var successCount uint64
            for res := range results {
                if res.Code == 200 {
                    successCount++
                }
            }
            defer results.Close()

            So(successCount, ShouldBeGreaterThan, 0)
        })

        Convey("take less than 500ms per request", func() {
            var latencyHist vegeta.Histogram
            for res := range results {
                latencyHist.Add(res.Latency)
            }
            defer results.Close()

            p95 := latencyHist.Percentile(95)
            So(p95, ShouldBeLessThan, 500*time.Millisecond)
        })
    })
}

How to run

1. Run server: go run server.go
2. Run test: go test

Conclusion

Using Vegeta and GoConvey, we can easily create automatable performance tests. These tests provide a scalable and readable mechanism to verify the performance of your code and ensure it operates properly under heavy load.

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