hoge_test.go

package main
  
import (
  "testing"
  "time"
)

func BenchmarkTimeDate(b *testing.B) {
  now := time.Now()

  b.ResetTimer()
  b.ReportAllocs()
  for n := 0; n < b.N; n++ {
    now.Date()
  }
}

func BenchmarkTimeYearMonthDay(b *testing.B) {
  now := time.Now()

  b.ResetTimer()
  b.ReportAllocs()
  for n := 0; n < b.N; n++ {
    now.Year()
    now.Month()
    now.Day()
  }
}

result.txt

% go test -bench . -benchmem --tags=parallel                                                                                 [~/dev/src/github.com/kouzoh/merpay-api:2:52]
goos: darwin
goarch: amd64
BenchmarkTimeDate-4             45085794                24.1 ns/op             0 B/op          0 allocs/op
BenchmarkTimeYearMonthDay-4     19379534                62.1 ns/op             0 B/op          0 allocs/op
PASS