.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/xerrors@v0.0.0-20200804184101-5ec99f83aff1/stack_test.go

   1 // Copyright 2018 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 package xerrors_test
   6
   7 import (
   8         "bytes"
   9         "fmt"
  10         "math/big"
  11         "testing"
  12
  13         "golang.org/x/xerrors"
  14         "golang.org/x/xerrors/internal"
  15 )
  16
  17 type myType struct{}
  18
  19 func (myType) Format(s fmt.State, v rune) {
  20         s.Write(bytes.Repeat([]byte("Hi! "), 10))
  21 }
  22
  23 func BenchmarkErrorf(b *testing.B) {
  24         err := xerrors.New("foo")
  25         // pi := big.NewFloat(3.14) // Something expensive.
  26         num := big.NewInt(5)
  27         args := func(a ...interface{}) []interface{} { return a }
  28         benchCases := []struct {
  29                 name   string
  30                 format string
  31                 args   []interface{}
  32         }{
  33                 {"no_format", "msg: %v", args(err)},
  34                 {"with_format", "failed %d times: %v", args(5, err)},
  35                 {"method: mytype", "pi: %v", args("myfile.go", myType{}, err)},
  36                 {"method: number", "pi: %v", args("myfile.go", num, err)},
  37         }
  38         for _, bc := range benchCases {
  39                 b.Run(bc.name, func(b *testing.B) {
  40                         b.Run("ExpWithTrace", func(b *testing.B) {
  41                                 for i := 0; i < b.N; i++ {
  42                                         xerrors.Errorf(bc.format, bc.args...)
  43                                 }
  44                         })
  45                         b.Run("ExpNoTrace", func(b *testing.B) {
  46                                 internal.EnableTrace = false
  47                                 defer func() { internal.EnableTrace = true }()
  48
  49                                 for i := 0; i < b.N; i++ {
  50                                         xerrors.Errorf(bc.format, bc.args...)
  51                                 }
  52                         })
  53                         b.Run("Core", func(b *testing.B) {
  54                                 for i := 0; i < b.N; i++ {
  55                                         fmt.Errorf(bc.format, bc.args...)
  56                                 }
  57                         })
  58                 })
  59         }
  60 }