How to understand the delay on time?

run.sh

$ go get github.com/fiam/gounidecode/unidecode
$ go get github.com/rainycape/unidecode

$ time go test github.com/fiam/gounidecode/unidecode
ok  	github.com/fiam/gounidecode/unidecode	0.039s

real	0m9.629s
user	0m1.621s
sys	0m1.647s

$ time go test github.com/rainycape/unidecode
ok  	github.com/rainycape/unidecode	0.197s

real	0m1.000s
user	0m0.328s
sys	0m0.154s

$ time go install ./test.go 

real	0m0.534s
user	0m0.223s
sys	0m0.043s
 
$ time ./test 
ABCDEF
Knosos
Bei Jing 

real	0m0.034s
user	0m0.017s
sys	0m0.000s

test.go

package main

import (
	uni "github.com/fiam/gounidecode/unidecode"
	"fmt"
)

func testTransliteration(original string, decoded string) {
	if r := uni.Unidecode(original); r != decoded {
		fmt.Println("Error", decoded)
	}
	fmt.Println(decoded)
}


func TestASCII() {
	s := "ABCDEF"
	testTransliteration(s, s)
}

func TestKnosos() {
	o := "Κνωσός"
	d := "Knosos"
	testTransliteration(o, d)
}

func TestBeiJing() {
	o := "\u5317\u4EB0"
	d := "Bei Jing "
	testTransliteration(o, d)
}

func main() {
    TestASCII()
    TestKnosos()
    TestBeiJing()
}

# time go test github.com/fiam/gounidecode/unidecode
ok      github.com/fiam/gounidecode/unidecode   0.038s

real    0m26.925s
user    0m2.329s
sys 0m1.926s