test_openapi_proto.go

package main

import (
	"bytes"
	"compress/gzip"
	"fmt"
	"io/ioutil"
	"os"
	"time"

	"github.com/golang/protobuf/proto"

	openapi "github.com/googleapis/gnostic/OpenAPIv2"
)

func exitIfError(err error) {
	if err != nil {
		fmt.Print(err)
		os.Exit(1)
	}
}

func decompress(in []byte) ([]byte, error) {
	reader, err := gzip.NewReader(bytes.NewReader(in))
	if err != nil {
		return nil, err
	}
	return ioutil.ReadAll(reader)
}

func main() {
	data, err := ioutil.ReadFile("swagger.pb.gz")
	exitIfError(err)
	start := time.Now()
	for i := 0; i < 10; i++ {
		rdata, err := decompress(data)
		exitIfError(err)
		doc := &openapi.Document{}
		err = proto.Unmarshal(rdata, doc)
		exitIfError(err)
	}
	elapsed1 := time.Since(start)

	data, err = ioutil.ReadFile("swagger.pb.org")
	exitIfError(err)
	start = time.Now()
	for i := 0; i < 10; i++ {
		doc := &openapi.Document{}
		err = proto.Unmarshal(data, doc)
		exitIfError(err)
	}
	elapsed2 := time.Since(start)
	fmt.Printf("Elpase 1=%s, Elapse 2=%s\n", elapsed1, elapsed2)
}