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| 1 | +// +build go1.7 |
| 2 | + |
| 3 | +package errors |
| 4 | + |
| 5 | +import ( |
| 6 | + "fmt" |
| 7 | + "testing" |
| 8 | + |
| 9 | + stderrors "errors" |
| 10 | +) |
| 11 | + |
| 12 | +func noErrors(at, depth int) error { |
| 13 | + if at >= depth { |
| 14 | + return stderrors.New("no error") |
| 15 | + } |
| 16 | + return noErrors(at+1, depth) |
| 17 | +} |
| 18 | + |
| 19 | +func yesErrors(at, depth int) error { |
| 20 | + if at >= depth { |
| 21 | + return New("ye error") |
| 22 | + } |
| 23 | + return yesErrors(at+1, depth) |
| 24 | +} |
| 25 | + |
| 26 | +// GlobalE is an exported global to store the result of benchmark results, |
| 27 | +// preventing the compiler from optimising the benchmark functions away. |
| 28 | +var GlobalE interface{} |
| 29 | + |
| 30 | +func BenchmarkErrors(b *testing.B) { |
| 31 | + type run struct { |
| 32 | + stack int |
| 33 | + std bool |
| 34 | + } |
| 35 | + runs := []run{ |
| 36 | + {10, false}, |
| 37 | + {10, true}, |
| 38 | + {100, false}, |
| 39 | + {100, true}, |
| 40 | + {1000, false}, |
| 41 | + {1000, true}, |
| 42 | + } |
| 43 | + for _, r := range runs { |
| 44 | + part := "pkg/errors" |
| 45 | + if r.std { |
| 46 | + part = "errors" |
| 47 | + } |
| 48 | + name := fmt.Sprintf("%s-stack-%d", part, r.stack) |
| 49 | + b.Run(name, func(b *testing.B) { |
| 50 | + var err error |
| 51 | + f := yesErrors |
| 52 | + if r.std { |
| 53 | + f = noErrors |
| 54 | + } |
| 55 | + b.ReportAllocs() |
| 56 | + for i := 0; i < b.N; i++ { |
| 57 | + err = f(0, r.stack) |
| 58 | + } |
| 59 | + b.StopTimer() |
| 60 | + GlobalE = err |
| 61 | + }) |
| 62 | + } |
| 63 | +} |
| 64 | + |
| 65 | +func BenchmarkStackFormatting(b *testing.B) { |
| 66 | + type run struct { |
| 67 | + stack int |
| 68 | + format string |
| 69 | + } |
| 70 | + runs := []run{ |
| 71 | + {10, "%s"}, |
| 72 | + {10, "%v"}, |
| 73 | + {10, "%+v"}, |
| 74 | + {30, "%s"}, |
| 75 | + {30, "%v"}, |
| 76 | + {30, "%+v"}, |
| 77 | + {60, "%s"}, |
| 78 | + {60, "%v"}, |
| 79 | + {60, "%+v"}, |
| 80 | + } |
| 81 | + |
| 82 | + var stackStr string |
| 83 | + for _, r := range runs { |
| 84 | + name := fmt.Sprintf("%s-stack-%d", r.format, r.stack) |
| 85 | + b.Run(name, func(b *testing.B) { |
| 86 | + err := yesErrors(0, r.stack) |
| 87 | + b.ReportAllocs() |
| 88 | + b.ResetTimer() |
| 89 | + for i := 0; i < b.N; i++ { |
| 90 | + stackStr = fmt.Sprintf(r.format, err) |
| 91 | + } |
| 92 | + b.StopTimer() |
| 93 | + }) |
| 94 | + } |
| 95 | + |
| 96 | + for _, r := range runs { |
| 97 | + name := fmt.Sprintf("%s-stacktrace-%d", r.format, r.stack) |
| 98 | + b.Run(name, func(b *testing.B) { |
| 99 | + err := yesErrors(0, r.stack) |
| 100 | + st := err.(*fundamental).stack.StackTrace() |
| 101 | + b.ReportAllocs() |
| 102 | + b.ResetTimer() |
| 103 | + for i := 0; i < b.N; i++ { |
| 104 | + stackStr = fmt.Sprintf(r.format, st) |
| 105 | + } |
| 106 | + b.StopTimer() |
| 107 | + }) |
| 108 | + } |
| 109 | + GlobalE = stackStr |
| 110 | +} |
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