package main

import (
    "encoding/asn1"
    "fmt"
    "time"
)

type Example struct {
    Greeting string `asn1:"utf8"`
    Answer   int
    Tipe     asn1.ObjectIdentifier `asn1:"explicit,tag:1"`
}

func main() {
    iterations := 1000
    expected_output := []byte{0x30, 18, 12, 5, 72, 101, 108, 108, 111, 2, 1, 42, 0xA1,
        6, 6, 4, 43, 6, 1, 3}

    oid := []int{1, 3, 6, 1, 3}

    ex := Example{
        Greeting: "Hello",
        Answer:   42,
        Tipe:     asn1.ObjectIdentifier(oid),
    }
    fmt.Println("Benchmarking golang Marshal...")
    var totalMarshalTime int64
    for i := 0; i < iterations; i++ {
        start := time.Now()
        _, err := asn1.Marshal(ex)
        if err != nil {
            panic(err)
        }
        totalMarshalTime += time.Since(start).Microseconds()
    }
    avgMarshalTime := totalMarshalTime / int64(iterations)
    fmt.Printf("Average Marshal time: %d µs\n", avgMarshalTime)

    fmt.Println("Benchmarking Unmarshal...")
    var totalUnmarshalTime int64
    var xx Example
    for i := 0; i < iterations; i++ {
        start := time.Now()
        _, err := asn1.Unmarshal(expected_output, &xx)
        if err != nil {
            panic(err)
        }
        totalUnmarshalTime += time.Since(start).Microseconds()
    }
    avgUnmarshalTime := totalUnmarshalTime / int64(iterations)
    fmt.Printf("Average Unmarshal time: %d µs\n", avgUnmarshalTime)
}