The testing package, apart from containing tools for testing, also contains tools for benchmarking. The way to create a benchmark itself is quite easy, namely by creating a function whose name begins with Benchmark and whose parameters are of type *testing.B.
Create a program in the main.go file
Create a program like the one below, where in this program there is a Tube Struct which will consist of several methods, including the following.
First, prepare a Tube struct. We will later use the object variables resulting from this struct as testing material.
package main
import "math"
type Tabung struct {
Jarijari, Tinggi float64
}
func (t Tabung) Volume() float64 {
return math.Phi * math.Pow(t.Jarijari, 2) * t.Tinggi
}
func (t Tabung) Luas() float64 {
return 2 * math.Phi * t.Jarijari * (t.Jarijari + t.Tinggi)
}
func (t Tabung) KelilingAlas() float64 {
return 2 * math.Phi * t.Jarijari
}
Then, we will test the performance of calculating the area of the tube. Prepare a function with the name BenchmarkCalculateArea() with the contents of the following code.
func BenchmarkHitungLuas(b *testing.B) {
tabung := Tabung{Jarijari: 7, Tinggi: 10}
for i := 0; i < b.N; i++ {
tabung.Luas()
}
}
Run the test using the argument -bench=., this argument is used to indicate that apart from testing there is also a benchmark that needs to be tested.
➜ tabung git:(main) ✗ go test -v -bench=.
=== RUN TestTabung_Volume
=== RUN TestTabung_Volume/testing_hitung_volume
--- PASS: TestTabung_Volume (0.00s)
--- PASS: TestTabung_Volume/testing_hitung_volume (0.00s)
=== RUN TestTabung_Luas
=== RUN TestTabung_Luas/testing_hitung_luas_permukaan
--- PASS: TestTabung_Luas (0.00s)
--- PASS: TestTabung_Luas/testing_hitung_luas_permukaan (0.00s)
=== RUN TestTabung_KelilingAlas
=== RUN TestTabung_KelilingAlas/testing_hitung_keliling_alas
--- PASS: TestTabung_KelilingAlas (0.00s)
--- PASS: TestTabung_KelilingAlas/testing_hitung_keliling_alas (0.00s)
goos: darwin
goarch: arm64
pkg: github.com/santekno/tabung
BenchmarkHitungLuas
BenchmarkHitungLuas-8 1000000000 0.3317 ns/op
PASS
ok github.com/santekno/tabung 2.557s
How to read Benchmark results
The meaning of 1000000000 0.3317 ns/op is, the function above was tested 1 billion times, the result is that it takes an average of 0.3317 nano seconds to run one function.
How to Create Unit Tests in Golang
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