forked from golang/glog
-
Notifications
You must be signed in to change notification settings - Fork 0
/
glog_bench_test.go
164 lines (136 loc) · 3.17 KB
/
glog_bench_test.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
package glog
import (
"flag"
"io/ioutil"
"runtime"
"sync"
"sync/atomic"
"testing"
"time"
)
// discarder is a flushSyncWriter that discards all data.
// Sync sleeps for 10ms to simulate a disk seek.
type discarder struct {
}
func (d *discarder) Write(data []byte) (int, error) {
return len(data), nil
}
func (d *discarder) Flush() error {
return nil
}
func (d *discarder) Sync() error {
time.Sleep(10 * time.Millisecond)
return nil
}
func (d *discarder) filenames() []string {
return nil
}
// newDiscard sets the log writers to all new byte buffers and returns the old array.
func (s *fileSink) newDiscarders() severityWriters {
return s.swap(severityWriters{new(discarder), new(discarder), new(discarder), new(discarder)})
}
func discardStderr() func() {
se := sinks.stderr.w
sinks.stderr.w = ioutil.Discard
return func() { sinks.stderr.w = se }
}
const message = "benchmark log message"
func benchmarkLog(b *testing.B, log func(...any)) {
defer sinks.file.swap(sinks.file.newDiscarders())
defer discardStderr()()
b.ResetTimer()
for i := 0; i < b.N; i++ {
log(message)
}
b.StopTimer()
}
func benchmarkLogConcurrent(b *testing.B, log func(...any)) {
defer sinks.file.swap(sinks.file.newDiscarders())
defer discardStderr()()
b.ResetTimer()
concurrency := runtime.GOMAXPROCS(0)
var wg sync.WaitGroup
wg.Add(concurrency)
for i := 0; i < concurrency; i++ {
go func() {
for i := 0; i < b.N; i++ {
log(message)
}
wg.Done()
}()
}
wg.Wait()
b.StopTimer()
}
func BenchmarkInfo(b *testing.B) {
benchmarkLog(b, Info)
}
func BenchmarkInfoConcurrent(b *testing.B) {
benchmarkLogConcurrent(b, Info)
}
func BenchmarkWarning(b *testing.B) {
benchmarkLog(b, Warning)
}
func BenchmarkWarningConcurrent(b *testing.B) {
benchmarkLogConcurrent(b, Warning)
}
func BenchmarkError(b *testing.B) {
benchmarkLog(b, Error)
}
func BenchmarkErrorConcurrent(b *testing.B) {
benchmarkLogConcurrent(b, Error)
}
func mixer() func(...any) {
var i int64
return func(args ...any) {
n := atomic.AddInt64(&i, 1)
switch {
case n%10000 == 0:
Error(args...)
case n%1000 == 0:
Warning(args...)
default:
Info(args...)
}
}
}
func BenchmarkMix(b *testing.B) {
benchmarkLog(b, mixer())
}
func BenchmarkMixConcurrent(b *testing.B) {
benchmarkLogConcurrent(b, mixer())
}
func BenchmarkVLogDisabled(b *testing.B) {
benchmarkLog(b, vlog)
}
func BenchmarkVLogDisabledConcurrent(b *testing.B) {
benchmarkLogConcurrent(b, vlog)
}
func BenchmarkVLogModuleFlagSet(b *testing.B) {
defer withVmodule("nonexistant=5")()
benchmarkLog(b, vlog)
}
func BenchmarkVLogModuleFlagSetConcurrent(b *testing.B) {
defer withVmodule("nonexistant=5")()
benchmarkLogConcurrent(b, vlog)
}
func BenchmarkVLogEnabled(b *testing.B) {
defer withVmodule("glog_bench_test=5")()
if got := bool(V(3)); got != true {
b.Fatalf("V(3) == %v, want %v", got, true)
}
benchmarkLog(b, vlog)
}
func BenchmarkVLogEnabledConcurrent(b *testing.B) {
defer withVmodule("glog_bench_test=5")()
benchmarkLogConcurrent(b, vlog)
}
func vlog(args ...any) {
V(3).Info(args)
}
func withVmodule(val string) func() {
if err := flag.Set("vmodule", val); err != nil {
panic(err)
}
return func() { flag.Set("vmodule", "") }
}