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|
package struc
import (
"bytes"
"encoding/binary"
"testing"
)
type BenchExample struct {
Test [5]byte
A int32
B, C, D int16
Test2 [4]byte
Length int32
}
type BenchStrucExample struct {
Test [5]byte `struc:"[5]byte"`
A int `struc:"int32"`
B, C, D int `struc:"int16"`
Test2 [4]byte `struc:"[4]byte"`
Length int `struc:"int32,sizeof=Data"`
Data []byte
}
var benchRef = &BenchExample{
[5]byte{1, 2, 3, 4, 5},
1, 2, 3, 4,
[4]byte{1, 2, 3, 4},
8,
}
var eightBytes = []byte("8bytestr")
var benchStrucRef = &BenchStrucExample{
[5]byte{1, 2, 3, 4, 5},
1, 2, 3, 4,
[4]byte{1, 2, 3, 4},
8, eightBytes,
}
func BenchmarkEncode(b *testing.B) {
for i := 0; i < b.N; i++ {
var buf bytes.Buffer
err := Pack(&buf, benchStrucRef)
if err != nil {
b.Fatal(err)
}
}
}
func BenchmarkStdlibEncode(b *testing.B) {
for i := 0; i < b.N; i++ {
var buf bytes.Buffer
err := binary.Write(&buf, binary.BigEndian, benchRef)
if err != nil {
b.Fatal(err)
}
_, err = buf.Write(eightBytes)
if err != nil {
b.Fatal(err)
}
}
}
func BenchmarkManualEncode(b *testing.B) {
order := binary.BigEndian
s := benchStrucRef
for i := 0; i < b.N; i++ {
var buf bytes.Buffer
tmp := make([]byte, 29)
copy(tmp[0:5], s.Test[:])
order.PutUint32(tmp[5:9], uint32(s.A))
order.PutUint16(tmp[9:11], uint16(s.B))
order.PutUint16(tmp[11:13], uint16(s.C))
order.PutUint16(tmp[13:15], uint16(s.D))
copy(tmp[15:19], s.Test2[:])
order.PutUint32(tmp[19:23], uint32(s.Length))
copy(tmp[23:], s.Data)
_, err := buf.Write(tmp)
if err != nil {
b.Fatal(err)
}
}
}
func BenchmarkDecode(b *testing.B) {
var out BenchStrucExample
var buf bytes.Buffer
if err := Pack(&buf, benchStrucRef); err != nil {
b.Fatal(err)
}
bufBytes := buf.Bytes()
for i := 0; i < b.N; i++ {
buf := bytes.NewReader(bufBytes)
err := Unpack(buf, &out)
if err != nil {
b.Fatal(err)
}
out.Data = nil
}
}
func BenchmarkStdlibDecode(b *testing.B) {
var out BenchExample
var buf bytes.Buffer
binary.Write(&buf, binary.BigEndian, *benchRef)
_, err := buf.Write(eightBytes)
if err != nil {
b.Fatal(err)
}
bufBytes := buf.Bytes()
for i := 0; i < b.N; i++ {
buf := bytes.NewReader(bufBytes)
err := binary.Read(buf, binary.BigEndian, &out)
if err != nil {
b.Fatal(err)
}
tmp := make([]byte, out.Length)
_, err = buf.Read(tmp)
if err != nil {
b.Fatal(err)
}
}
}
func BenchmarkManualDecode(b *testing.B) {
var o BenchStrucExample
var buf bytes.Buffer
if err := Pack(&buf, benchStrucRef); err != nil {
b.Fatal(err)
}
tmp := buf.Bytes()
order := binary.BigEndian
for i := 0; i < b.N; i++ {
copy(o.Test[:], tmp[0:5])
o.A = int(order.Uint32(tmp[5:9]))
o.B = int(order.Uint16(tmp[9:11]))
o.C = int(order.Uint16(tmp[11:13]))
o.D = int(order.Uint16(tmp[13:15]))
copy(o.Test2[:], tmp[15:19])
o.Length = int(order.Uint32(tmp[19:23]))
o.Data = make([]byte, o.Length)
copy(o.Data, tmp[23:])
}
}
func BenchmarkFullEncode(b *testing.B) {
for i := 0; i < b.N; i++ {
var buf bytes.Buffer
if err := Pack(&buf, reference); err != nil {
b.Fatal(err)
}
}
}
func BenchmarkFullDecode(b *testing.B) {
var out Example
for i := 0; i < b.N; i++ {
buf := bytes.NewBuffer(referenceBytes)
if err := Unpack(buf, &out); err != nil {
b.Fatal(err)
}
}
}
|
