bench_test.go

package main

import (
	"fmt"
	"testing"
)

type SampleStruct struct {
	a int
	b int
	c int
	d int
	e int
	f int
	g int
	h int
	i int
	j int
}

func structP(s *SampleStruct) int {
	s.a++

	c := s.c

	return s.a + s.b + c
}

func structV(s SampleStruct) int {
	s.a++

	c := s.c

	return s.a + s.b + c
}

func BenchmarkStructPointerReceiver(b *testing.B) {
	r := 0
	for i := 0; i < b.N; i++ {
		s := &SampleStruct{
			a: 1,
			b: 1,
			c: 1,
			d: 1,
			e: 1,
			f: 1,
			g: 1,
			h: 1,
			i: 1,
			j: 1,
		}
		r = structP(s)
	}

	fmt.Printf("r: %d \n", r)
}

func BenchmarkStructValueReceiver(b *testing.B) {
	r := 0
	for i := 0; i < b.N; i++ {
		s := SampleStruct{
			a: 1,
			b: 1,
			c: 1,
			d: 1,
			e: 1,
			f: 1,
			g: 1,
			h: 1,
			i: 1,
			j: 1,
		}
		r = structV(s)
	}

	fmt.Printf("r: %d \n", r)
}