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
|
// Copyright 2018 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.
package xerrors_test
import (
"bytes"
"fmt"
"math/big"
"testing"
"golang.org/x/xerrors"
"golang.org/x/xerrors/internal"
)
type myType struct{}
func (myType) Format(s fmt.State, v rune) {
s.Write(bytes.Repeat([]byte("Hi! "), 10))
}
func BenchmarkErrorf(b *testing.B) {
err := xerrors.New("foo")
// pi := big.NewFloat(3.14) // Something expensive.
num := big.NewInt(5)
args := func(a ...interface{}) []interface{} { return a }
benchCases := []struct {
name string
format string
args []interface{}
}{
{"no_format", "msg: %v", args(err)},
{"with_format", "failed %d times: %v", args(5, err)},
{"method: mytype", "pi: %v", args("myfile.go", myType{}, err)},
{"method: number", "pi: %v", args("myfile.go", num, err)},
}
for _, bc := range benchCases {
b.Run(bc.name, func(b *testing.B) {
b.Run("ExpWithTrace", func(b *testing.B) {
for i := 0; i < b.N; i++ {
xerrors.Errorf(bc.format, bc.args...)
}
})
b.Run("ExpNoTrace", func(b *testing.B) {
internal.EnableTrace = false
defer func() { internal.EnableTrace = true }()
for i := 0; i < b.N; i++ {
xerrors.Errorf(bc.format, bc.args...)
}
})
b.Run("Core", func(b *testing.B) {
for i := 0; i < b.N; i++ {
fmt.Errorf(bc.format, bc.args...)
}
})
})
}
}
|
