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- // Copyright 2011 The Go Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style
- // license that can be found in the LICENSE file.
- // Large data benchmark.
- // The JSON data is a summary of agl's changes in the
- // go, webkit, and chromium open source projects.
- // We benchmark converting between the JSON form
- // and in-memory data structures.
- package json
- import (
- "bytes"
- "compress/gzip"
- "io/ioutil"
- "os"
- "testing"
- )
- type codeResponse struct {
- Tree *codeNode `json:"tree"`
- Username string `json:"username"`
- }
- type codeNode struct {
- Name string `json:"name"`
- Kids []*codeNode `json:"kids"`
- CLWeight float64 `json:"cl_weight"`
- Touches int `json:"touches"`
- MinT int64 `json:"min_t"`
- MaxT int64 `json:"max_t"`
- MeanT int64 `json:"mean_t"`
- }
- var codeJSON []byte
- var codeStruct codeResponse
- func codeInit() {
- f, err := os.Open("testdata/code.json.gz")
- if err != nil {
- panic(err)
- }
- defer f.Close()
- gz, err := gzip.NewReader(f)
- if err != nil {
- panic(err)
- }
- data, err := ioutil.ReadAll(gz)
- if err != nil {
- panic(err)
- }
- codeJSON = data
- if err := Unmarshal(codeJSON, &codeStruct); err != nil {
- panic("unmarshal code.json: " + err.Error())
- }
- if data, err = Marshal(&codeStruct); err != nil {
- panic("marshal code.json: " + err.Error())
- }
- if !bytes.Equal(data, codeJSON) {
- println("different lengths", len(data), len(codeJSON))
- for i := 0; i < len(data) && i < len(codeJSON); i++ {
- if data[i] != codeJSON[i] {
- println("re-marshal: changed at byte", i)
- println("orig: ", string(codeJSON[i-10:i+10]))
- println("new: ", string(data[i-10:i+10]))
- break
- }
- }
- panic("re-marshal code.json: different result")
- }
- }
- func BenchmarkCodeEncoder(b *testing.B) {
- if codeJSON == nil {
- b.StopTimer()
- codeInit()
- b.StartTimer()
- }
- enc := NewEncoder(ioutil.Discard)
- for i := 0; i < b.N; i++ {
- if err := enc.Encode(&codeStruct); err != nil {
- b.Fatal("Encode:", err)
- }
- }
- b.SetBytes(int64(len(codeJSON)))
- }
- func BenchmarkCodeMarshal(b *testing.B) {
- if codeJSON == nil {
- b.StopTimer()
- codeInit()
- b.StartTimer()
- }
- for i := 0; i < b.N; i++ {
- if _, err := Marshal(&codeStruct); err != nil {
- b.Fatal("Marshal:", err)
- }
- }
- b.SetBytes(int64(len(codeJSON)))
- }
- func BenchmarkCodeDecoder(b *testing.B) {
- if codeJSON == nil {
- b.StopTimer()
- codeInit()
- b.StartTimer()
- }
- var buf bytes.Buffer
- dec := NewDecoder(&buf)
- var r codeResponse
- for i := 0; i < b.N; i++ {
- buf.Write(codeJSON)
- // hide EOF
- buf.WriteByte('\n')
- buf.WriteByte('\n')
- buf.WriteByte('\n')
- if err := dec.Decode(&r); err != nil {
- b.Fatal("Decode:", err)
- }
- }
- b.SetBytes(int64(len(codeJSON)))
- }
- func BenchmarkCodeUnmarshal(b *testing.B) {
- if codeJSON == nil {
- b.StopTimer()
- codeInit()
- b.StartTimer()
- }
- for i := 0; i < b.N; i++ {
- var r codeResponse
- if err := Unmarshal(codeJSON, &r); err != nil {
- b.Fatal("Unmmarshal:", err)
- }
- }
- b.SetBytes(int64(len(codeJSON)))
- }
- func BenchmarkCodeUnmarshalReuse(b *testing.B) {
- if codeJSON == nil {
- b.StopTimer()
- codeInit()
- b.StartTimer()
- }
- var r codeResponse
- for i := 0; i < b.N; i++ {
- if err := Unmarshal(codeJSON, &r); err != nil {
- b.Fatal("Unmmarshal:", err)
- }
- }
- }
- func BenchmarkUnmarshalString(b *testing.B) {
- data := []byte(`"hello, world"`)
- var s string
- for i := 0; i < b.N; i++ {
- if err := Unmarshal(data, &s); err != nil {
- b.Fatal("Unmarshal:", err)
- }
- }
- }
- func BenchmarkUnmarshalFloat64(b *testing.B) {
- var f float64
- data := []byte(`3.14`)
- for i := 0; i < b.N; i++ {
- if err := Unmarshal(data, &f); err != nil {
- b.Fatal("Unmarshal:", err)
- }
- }
- }
- func BenchmarkUnmarshalInt64(b *testing.B) {
- var x int64
- data := []byte(`3`)
- for i := 0; i < b.N; i++ {
- if err := Unmarshal(data, &x); err != nil {
- b.Fatal("Unmarshal:", err)
- }
- }
- }
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