[Go] best way to copy string

Re: [go-nuts] the best way to copy a string in go

func Copy(s string) string { 
        var b []byte 
        h := (*reflect.SliceHeader)(unsafe.Pointer(&b)) 
        h.Data = (*reflect.StringHeader)(unsafe.Pointer(&s)).Data 
        h.Len = len(s) 
        h.Cap = len(s) 
        return string(b) 
}