pool.go

package main

import (
	"sync"
	"testing"
)

type MyStruct struct {
  FirstName string
  LastName string
}

func myObjectPool() *sync.Pool {
	return &sync.Pool{
		New: func() interface{} {
			return &MyStruct{}
		},
	}
}

func withoutPool() {
	obj := &MyStruct{}
	_ = obj
}

func withPool(pool *sync.Pool) {
	obj := pool.Get().(*MyStruct)
	_ = obj
	pool.Put(obj)
}

func BenchmarkWithoutPool(b *testing.B) {
	for i := 0; i < b.N; i++ {
		withoutPool()
	}
}

func BenchmarkWithPool(b *testing.B) {
	pool := myObjectPool()
	for i := 0; i < b.N; i++ {
		withPool(pool)
	}
}