The Prometheus monitoring system and time series database.
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// Copyright 2017 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package test
import (
"bytes"
"crypto/rand"
"testing"
"github.com/prometheus/prometheus/model/labels"
)
func BenchmarkMapClone(b *testing.B) {
m := map[string]string{
"job": "node",
"instance": "123.123.1.211:9090",
"path": "/api/v1/namespaces/<namespace>/deployments/<name>",
"method": "GET",
"namespace": "system",
"status": "500",
"prometheus": "prometheus-core-1",
"datacenter": "eu-west-1",
"pod_name": "abcdef-99999-defee",
}
for i := 0; i < b.N; i++ {
res := make(map[string]string, len(m))
for k, v := range m {
res[k] = v
}
m = res
}
}
func BenchmarkLabelsClone(b *testing.B) {
m := map[string]string{
"job": "node",
"instance": "123.123.1.211:9090",
"path": "/api/v1/namespaces/<namespace>/deployments/<name>",
"method": "GET",
"namespace": "system",
"status": "500",
"prometheus": "prometheus-core-1",
"datacenter": "eu-west-1",
"pod_name": "abcdef-99999-defee",
}
l := labels.FromMap(m)
for i := 0; i < b.N; i++ {
res := make(labels.Labels, len(l))
copy(res, l)
l = res
}
}
func BenchmarkLabelMapAccess(b *testing.B) {
m := map[string]string{
"job": "node",
"instance": "123.123.1.211:9090",
"path": "/api/v1/namespaces/<namespace>/deployments/<name>",
"method": "GET",
"namespace": "system",
"status": "500",
"prometheus": "prometheus-core-1",
"datacenter": "eu-west-1",
"pod_name": "abcdef-99999-defee",
}
var v string
for k := range m {
b.Run(k, func(b *testing.B) {
for i := 0; i < b.N; i++ {
v = m[k]
}
})
}
_ = v
}
func BenchmarkLabelSetAccess(b *testing.B) {
m := map[string]string{
"job": "node",
"instance": "123.123.1.211:9090",
"path": "/api/v1/namespaces/<namespace>/deployments/<name>",
"method": "GET",
"namespace": "system",
"status": "500",
"prometheus": "prometheus-core-1",
"datacenter": "eu-west-1",
"pod_name": "abcdef-99999-defee",
}
ls := labels.FromMap(m)
var v string
for _, l := range ls {
b.Run(l.Name, func(b *testing.B) {
for i := 0; i < b.N; i++ {
v = ls.Get(l.Name)
}
})
}
_ = v
}
func BenchmarkStringBytesEquals(b *testing.B) {
randBytes := func(n int) ([]byte, []byte) {
buf1 := make([]byte, n)
if _, err := rand.Read(buf1); err != nil {
b.Fatal(err)
}
buf2 := make([]byte, n)
copy(buf1, buf2)
return buf1, buf2
}
cases := []struct {
name string
f func() ([]byte, []byte)
}{
{
name: "equal",
f: func() ([]byte, []byte) {
return randBytes(60)
},
},
{
name: "1-flip-end",
f: func() ([]byte, []byte) {
b1, b2 := randBytes(60)
b2[59] ^= b2[59]
return b1, b2
},
},
{
name: "1-flip-middle",
f: func() ([]byte, []byte) {
b1, b2 := randBytes(60)
b2[29] ^= b2[29]
return b1, b2
},
},
{
name: "1-flip-start",
f: func() ([]byte, []byte) {
b1, b2 := randBytes(60)
b2[0] ^= b2[0]
return b1, b2
},
},
{
name: "different-length",
f: func() ([]byte, []byte) {
b1, b2 := randBytes(60)
return b1, b2[:59]
},
},
}
for _, c := range cases {
b.Run(c.name+"-strings", func(b *testing.B) {
ab, bb := c.f()
as, bs := string(ab), string(bb)
b.SetBytes(int64(len(as)))
var r bool
for i := 0; i < b.N; i++ {
r = as == bs
}
_ = r
})
b.Run(c.name+"-bytes", func(b *testing.B) {
ab, bb := c.f()
b.SetBytes(int64(len(ab)))
var r bool
for i := 0; i < b.N; i++ {
r = bytes.Equal(ab, bb)
}
_ = r
})
b.Run(c.name+"-bytes-length-check", func(b *testing.B) {
ab, bb := c.f()
b.SetBytes(int64(len(ab)))
var r bool
for i := 0; i < b.N; i++ {
if len(ab) != len(bb) {
continue
}
r = bytes.Equal(ab, bb)
}
_ = r
})
}
}