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