benchmark 测试

package main
import (
    "sync"
    "testing"
)
type Person struct {
    Age int
}
var (
    personPool = sync.Pool{
        New: func() interface{} {
            return &Person{}
        },
    }
)
func BenchmarkWithoutPool(b *testing.B) {
    var p *Person
    b.ReportAllocs()
    b.ResetTimer()
    for i := 0; i < b.N; i++ {
        for j := 0; j < 10000; j++ {
            p = new(Person)
            p.Age = 23
        }
    }
}
func BenchmarkWithPool(b *testing.B) {
    var p *Person
    b.ReportAllocs()
    b.ResetTimer()
    for i := 0; i < b.N; i++ {
        for j := 0; j < 10000; j++ {
            p = personPool.Get().(*Person)
            p.Age = 23
            personPool.Put(p)
        }
    }
}