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// Copyright 2014 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 context_test
import (
. "context"
"fmt"
"testing"
)
func BenchmarkContextCancelTree(b *testing.B) {
depths := []int{1, 10, 100, 1000}
for _, d := range depths {
b.Run(fmt.Sprintf("depth=%d", d), func(b *testing.B) {
b.Run("Root=Background", func(b *testing.B) {
for i := 0; i < b.N; i++ {
buildContextTree(Background(), d)
}
})
b.Run("Root=OpenCanceler", func(b *testing.B) {
for i := 0; i < b.N; i++ {
ctx, cancel := WithCancel(Background())
buildContextTree(ctx, d)
cancel()
}
})
b.Run("Root=ClosedCanceler", func(b *testing.B) {
for i := 0; i < b.N; i++ {
ctx, cancel := WithCancel(Background())
cancel()
buildContextTree(ctx, d)
}
})
})
}
}
func buildContextTree(root Context, depth int) {
for d := 0; d < depth; d++ {
root, _ = WithCancel(root)
}
}
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