Hulk did something

[bytom/vapor.git] / vendor / github.com / pkg / errors / bench_test.go

diff --git a/vendor/github.com/pkg/errors/bench_test.go b/vendor/github.com/pkg/errors/bench_test.go
new file mode 100644 (file)
index 0000000..903b5f2
--- /dev/null
+++ b/vendor/github.com/pkg/errors/bench_test.go
@@ -0,0 +1,63 @@
+// +build go1.7
+
+package errors
+
+import (
+       "fmt"
+       "testing"
+
+       stderrors "errors"
+)
+
+func noErrors(at, depth int) error {
+       if at >= depth {
+               return stderrors.New("no error")
+       }
+       return noErrors(at+1, depth)
+}
+
+func yesErrors(at, depth int) error {
+       if at >= depth {
+               return New("ye error")
+       }
+       return yesErrors(at+1, depth)
+}
+
+// GlobalE is an exported global to store the result of benchmark results,
+// preventing the compiler from optimising the benchmark functions away.
+var GlobalE error
+
+func BenchmarkErrors(b *testing.B) {
+       type run struct {
+               stack int
+               std   bool
+       }
+       runs := []run{
+               {10, false},
+               {10, true},
+               {100, false},
+               {100, true},
+               {1000, false},
+               {1000, true},
+       }
+       for _, r := range runs {
+               part := "pkg/errors"
+               if r.std {
+                       part = "errors"
+               }
+               name := fmt.Sprintf("%s-stack-%d", part, r.stack)
+               b.Run(name, func(b *testing.B) {
+                       var err error
+                       f := yesErrors
+                       if r.std {
+                               f = noErrors
+                       }
+                       b.ReportAllocs()
+                       for i := 0; i < b.N; i++ {
+                               err = f(0, r.stack)
+                       }
+                       b.StopTimer()
+                       GlobalE = err
+               })
+       }
+}