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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"
"strings"
"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()
}
b.RunParallel(func(pb *testing.PB) {
enc := NewEncoder(ioutil.Discard)
for pb.Next() {
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()
}
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
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()
}
b.RunParallel(func(pb *testing.PB) {
var buf bytes.Buffer
dec := NewDecoder(&buf)
var r codeResponse
for pb.Next() {
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 BenchmarkDecoderStream(b *testing.B) {
b.StopTimer()
var buf bytes.Buffer
dec := NewDecoder(&buf)
buf.WriteString(`"` + strings.Repeat("x", 1000000) + `"` + "\n\n\n")
var x interface{}
if err := dec.Decode(&x); err != nil {
b.Fatal("Decode:", err)
}
ones := strings.Repeat(" 1\n", 300000) + "\n\n\n"
b.StartTimer()
for i := 0; i < b.N; i++ {
if i%300000 == 0 {
buf.WriteString(ones)
}
x = nil
if err := dec.Decode(&x); err != nil || x != 1.0 {
b.Fatalf("Decode: %v after %d", err, i)
}
}
}
func BenchmarkCodeUnmarshal(b *testing.B) {
if codeJSON == nil {
b.StopTimer()
codeInit()
b.StartTimer()
}
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
var r codeResponse
if err := Unmarshal(codeJSON, &r); err != nil {
b.Fatal("Unmarshal:", err)
}
}
})
b.SetBytes(int64(len(codeJSON)))
}
func BenchmarkCodeUnmarshalReuse(b *testing.B) {
if codeJSON == nil {
b.StopTimer()
codeInit()
b.StartTimer()
}
b.RunParallel(func(pb *testing.PB) {
var r codeResponse
for pb.Next() {
if err := Unmarshal(codeJSON, &r); err != nil {
b.Fatal("Unmarshal:", err)
}
}
})
// TODO(bcmills): Is there a missing b.SetBytes here?
}
func BenchmarkUnmarshalString(b *testing.B) {
data := []byte(`"hello, world"`)
b.RunParallel(func(pb *testing.PB) {
var s string
for pb.Next() {
if err := Unmarshal(data, &s); err != nil {
b.Fatal("Unmarshal:", err)
}
}
})
}
func BenchmarkUnmarshalFloat64(b *testing.B) {
data := []byte(`3.14`)
b.RunParallel(func(pb *testing.PB) {
var f float64
for pb.Next() {
if err := Unmarshal(data, &f); err != nil {
b.Fatal("Unmarshal:", err)
}
}
})
}
func BenchmarkUnmarshalInt64(b *testing.B) {
data := []byte(`3`)
b.RunParallel(func(pb *testing.PB) {
var x int64
for pb.Next() {
if err := Unmarshal(data, &x); err != nil {
b.Fatal("Unmarshal:", err)
}
}
})
}
func BenchmarkIssue10335(b *testing.B) {
b.ReportAllocs()
j := []byte(`{"a":{ }}`)
b.RunParallel(func(pb *testing.PB) {
var s struct{}
for pb.Next() {
if err := Unmarshal(j, &s); err != nil {
b.Fatal(err)
}
}
})
}
func BenchmarkUnmapped(b *testing.B) {
b.ReportAllocs()
j := []byte(`{"s": "hello", "y": 2, "o": {"x": 0}, "a": [1, 99, {"x": 1}]}`)
b.RunParallel(func(pb *testing.PB) {
var s struct{}
for pb.Next() {
if err := Unmarshal(j, &s); err != nil {
b.Fatal(err)
}
}
})
}
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