Created
September 6, 2016 11:47
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package bench | |
import ( | |
"bytes" | |
"encoding/binary" | |
"io" | |
"testing" | |
) | |
func BenchmarkWriteByte(b *testing.B) { | |
var buf bytes.Buffer | |
for i := 0; i < b.N; i++ { | |
buf.Reset() | |
buf.WriteByte(uint8(i)) | |
buf.WriteByte(uint8(i >> 8)) | |
buf.WriteByte(uint8(i >> 16)) | |
buf.WriteByte(uint8(i >> 24)) | |
} | |
} | |
func BenchmarkWrite(b *testing.B) { | |
var buf bytes.Buffer | |
for i := 0; i < b.N; i++ { | |
buf.Reset() | |
buf.Write([]byte{uint8(i), uint8(i >> 8), uint8(i >> 16), uint8(i >> 24)}) | |
} | |
} | |
func BenchmarkReadByte(b *testing.B) { | |
r := bytes.NewReader([]byte{0xde, 0xad, 0xbe, 0xef}) | |
for i := 0; i < b.N; i++ { | |
r.Seek(0, io.SeekStart) | |
var b1, b2, b3, b4 uint8 | |
var err error | |
if b1, err = r.ReadByte(); err != nil { | |
panic(err) | |
} | |
if b2, err = r.ReadByte(); err != nil { | |
panic(err) | |
} | |
if b3, err = r.ReadByte(); err != nil { | |
panic(err) | |
} | |
if b4, err = r.ReadByte(); err != nil { | |
panic(err) | |
} | |
n := uint32(b1) + uint32(b2)<<8 + uint32(b3)<<16 + uint32(b4)<<24 | |
_ = n | |
} | |
} | |
func BenchmarkRead(b *testing.B) { | |
r := bytes.NewReader([]byte{0xde, 0xad, 0xbe, 0xef}) | |
for i := 0; i < b.N; i++ { | |
r.Seek(0, io.SeekStart) | |
s := make([]byte, 4) | |
if _, err := r.Read(s); err != nil { | |
panic(err) | |
} | |
n := binary.LittleEndian.Uint32(s) | |
_ = n | |
} | |
} | |
func BenchmarkReadSlice(b *testing.B) { | |
s := []byte{0xde, 0xad, 0xbe, 0xef} | |
for i := 0; i < b.N; i++ { | |
n := binary.LittleEndian.Uint32(s[0:]) | |
_ = n | |
} | |
} |
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