// Copyright 2013 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 mapper import ( "fmt" "math/rand" "testing" ) var ( ruleTemplateSingleMatchGlob = ` - match: metric%d.* name: "metric_single" labels: name: "$1" ` ruleTemplateSingleMatchRegex = ` - match: metric%d\.([^.]*) name: "metric_single" labels: name: "$1" ` ruleTemplateMultipleMatchGlob = ` - match: metric%d.*.*.*.*.*.*.*.*.*.*.*.* name: "metric_multi" labels: name: "$1-$2-$3.$4-$5-$6.$7-$8-$9.$10-$11-$12" ` ruleTemplateMultipleMatchRegex = ` - match: metric%d\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*) name: "metric_multi" labels: name: "$1-$2-$3.$4-$5-$6.$7-$8-$9.$10-$11-$12" ` ) func duplicateRules(count int, template string) string { rules := "" for i := 0; i < count; i++ { rules += fmt.Sprintf(template, i) } return rules } func BenchmarkGlob(b *testing.B) { config := `--- mappings: - match: test.dispatcher.*.*.succeeded name: "dispatch_events" labels: processor: "$1" action: "$2" result: "succeeded" job: "test_dispatcher" - match: test.my-dispatch-host01.name.dispatcher.*.*.* name: "host_dispatch_events" labels: processor: "$1" action: "$2" result: "$3" job: "test_dispatcher" - match: request_time.*.*.*.*.*.*.*.*.*.*.*.* name: "tyk_http_request" labels: method_and_path: "${1}" response_code: "${2}" apikey: "${3}" apiversion: "${4}" apiname: "${5}" apiid: "${6}" ipv4_t1: "${7}" ipv4_t2: "${8}" ipv4_t3: "${9}" ipv4_t4: "${10}" orgid: "${11}" oauthid: "${12}" - match: "*.*" name: "catchall" labels: first: "$1" second: "$2" third: "$3" job: "-" ` mappings := []string{ "test.dispatcher.FooProcessor.send.succeeded", "test.my-dispatch-host01.name.dispatcher.FooProcessor.send.succeeded", "request_time.get/threads/1/posts.200.00000000.nonversioned.discussions.a11bbcdf0ac64ec243658dc64b7100fb.172.20.0.1.12ba97b7eaa1a50001000001.", "foo.bar", "foo.bar.baz", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkGlobNoOrdering(b *testing.B) { config := `--- defaults: glob_disable_ordering: true mappings: - match: test.dispatcher.*.*.succeeded name: "dispatch_events" labels: processor: "$1" action: "$2" result: "succeeded" job: "test_dispatcher" - match: test.my-dispatch-host01.name.dispatcher.*.*.* name: "host_dispatch_events" labels: processor: "$1" action: "$2" result: "$3" job: "test_dispatcher" - match: request_time.*.*.*.*.*.*.*.*.*.*.*.* name: "tyk_http_request" labels: method_and_path: "${1}" response_code: "${2}" apikey: "${3}" apiversion: "${4}" apiname: "${5}" apiid: "${6}" ipv4_t1: "${7}" ipv4_t2: "${8}" ipv4_t3: "${9}" ipv4_t4: "${10}" orgid: "${11}" oauthid: "${12}" - match: "*.*" name: "catchall" labels: first: "$1" second: "$2" third: "$3" job: "-" ` mappings := []string{ "test.dispatcher.FooProcessor.send.succeeded", "test.my-dispatch-host01.name.dispatcher.FooProcessor.send.succeeded", "request_time.get/threads/1/posts.200.00000000.nonversioned.discussions.a11bbcdf0ac64ec243658dc64b7100fb.172.20.0.1.12ba97b7eaa1a50001000001.", "foo.bar", "foo.bar.baz", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkGlobNoOrderingWithBacktracking(b *testing.B) { config := `--- defaults: glob_disable_ordering: true mappings: - match: test.dispatcher.*.*.succeeded name: "dispatch_events" labels: processor: "$1" action: "$2" result: "succeeded" job: "test_dispatcher" - match: test.dispatcher.*.received.* name: "dispatch_events_wont_match" labels: processor: "$1" action: "received" result: "$2" job: "test_dispatcher" - match: test.my-dispatch-host01.name.dispatcher.*.*.* name: "host_dispatch_events" labels: processor: "$1" action: "$2" result: "$3" job: "test_dispatcher" - match: request_time.*.*.*.*.*.*.*.*.*.*.*.* name: "tyk_http_request" labels: method_and_path: "${1}" response_code: "${2}" apikey: "${3}" apiversion: "${4}" apiname: "${5}" apiid: "${6}" ipv4_t1: "${7}" ipv4_t2: "${8}" ipv4_t3: "${9}" ipv4_t4: "${10}" orgid: "${11}" oauthid: "${12}" - match: "*.*" name: "catchall" labels: first: "$1" second: "$2" third: "$3" job: "-" ` mappings := []string{ "test.dispatcher.FooProcessor.send.succeeded", "test.my-dispatch-host01.name.dispatcher.FooProcessor.send.succeeded", "request_time.get/threads/1/posts.200.00000000.nonversioned.discussions.a11bbcdf0ac64ec243658dc64b7100fb.172.20.0.1.12ba97b7eaa1a50001000001.", "foo.bar", "foo.bar.baz", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkRegex(b *testing.B) { config := `--- defaults: match_type: regex mappings: - match: test\.dispatcher\.([^.]*)\.([^.]*)\.([^.]*) name: "dispatch_events" labels: processor: "$1" action: "$2" result: "$3" job: "test_dispatcher" - match: test.my-dispatch-host01.name.dispatcher\.([^.]*)\.([^.]*)\.([^.]*) name: "host_dispatch_events" labels: processor: "$1" action: "$2" result: "$3" job: "test_dispatcher" - match: request_time\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*) name: "tyk_http_request" labels: method_and_path: "${1}" response_code: "${2}" apikey: "${3}" apiversion: "${4}" apiname: "${5}" apiid: "${6}" ipv4_t1: "${7}" ipv4_t2: "${8}" ipv4_t3: "${9}" ipv4_t4: "${10}" orgid: "${11}" oauthid: "${12}" - match: \.([^.]*)\.([^.]*) name: "catchall" labels: first: "$1" second: "$2" third: "$3" job: "-" ` mappings := []string{ "test.dispatcher.FooProcessor.send.succeeded", "test.my-dispatch-host01.name.dispatcher.FooProcessor.send.succeeded", "request_time.get/threads/1/posts.200.00000000.nonversioned.discussions.a11bbcdf0ac64ec243658dc64b7100fb.172.20.0.1.12ba97b7eaa1a50001000001.", "foo.bar", "foo.bar.baz", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkGlobSingleMatch(b *testing.B) { config := `--- mappings: - match: metric.* name: "metric_one" labels: name: "$1" ` mappings := []string{ "metric.aaa", "metric.bbb", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkRegexSingleMatch(b *testing.B) { config := `--- mappings: - match: metric\.([^.]*) name: "metric_one" match_type: regex labels: name: "$1" ` mappings := []string{ "metric.aaa", "metric.bbb", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkGlobMultipleCaptures(b *testing.B) { config := `--- mappings: - match: metric.*.*.*.*.*.*.*.*.*.*.*.* name: "metric_multi" labels: name: "$1-$2-$3.$4-$5-$6.$7-$8-$9.$10-$11-$12" ` mappings := []string{ "metric.a.b.c.d.e.f.g.h.i.j.k.l", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkRegexMultipleCaptures(b *testing.B) { config := `--- mappings: - match: metric\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*) name: "metric_multi" match_type: regex labels: name: "$1-$2-$3.$4-$5-$6.$7-$8-$9.$10-$11-$12" ` mappings := []string{ "metric.a.b.c.d.e.f.g.h.i.j.k.l", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkGlobMultipleCapturesNoFormat(b *testing.B) { config := `--- mappings: - match: metric.*.*.*.*.*.*.*.*.*.*.*.* name: "metric_multi" labels: name: "not_relevant" ` mappings := []string{ "metric.a.b.c.d.e.f.g.h.i.j.k.l", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkRegexMultipleCapturesNoFormat(b *testing.B) { config := `--- mappings: - match: metric\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*) name: "metric_multi" match_type: regex labels: name: "not_relevant" ` mappings := []string{ "metric.a.b.c.d.e.f.g.h.i.j.k.l", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkGlobMultipleCapturesDifferentLabels(b *testing.B) { config := `--- mappings: - match: metric.*.*.*.*.*.*.*.*.*.*.*.* name: "metric_multi" labels: label1: "$1" label2: "$2" label3: "$3" label4: "$4" label5: "$5" label6: "$6" label7: "$7" label8: "$8" label9: "$9" label10: "$10" label11: "$11" label12: "$12" ` mappings := []string{ "metric.a.b.c.d.e.f.g.h.i.j.k.l", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkRegexMultipleCapturesDifferentLabels(b *testing.B) { config := `--- mappings: - match: metric\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*)\.([^.]*) name: "metric_multi" match_type: regex labels: label1: "$1" label2: "$2" label3: "$3" label4: "$4" label5: "$5" label6: "$6" label7: "$7" label8: "$8" label9: "$9" label10: "$10" label11: "$11" label12: "$12" ` mappings := []string{ "metric.a.b.c.d.e.f.g.h.i.j.k.l", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkGlob10Rules(b *testing.B) { config := `--- mappings:` + duplicateRules(100, ruleTemplateSingleMatchGlob) mappings := []string{ "metric100.a", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkGlob10RulesCached(b *testing.B) { config := `--- mappings:` + duplicateRules(100, ruleTemplateSingleMatchGlob) mappings := []string{ "metric100.a", } for _, cacheType := range []string{"lru", "random"} { b.Run(cacheType, func(b *testing.B) { mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 1000, WithCacheType(cacheType)) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } }) } } func BenchmarkRegex10RulesAverage(b *testing.B) { config := `--- defaults: match_type: regex mappings:` + duplicateRules(10, ruleTemplateSingleMatchRegex) mappings := []string{ "metric5.a", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkRegex10RulesAverageCached(b *testing.B) { config := `--- defaults: match_type: regex mappings:` + duplicateRules(10, ruleTemplateSingleMatchRegex) mappings := []string{ "metric5.a", } for _, cacheType := range []string{"lru", "random"} { b.Run(cacheType, func(b *testing.B) { mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 1000, WithCacheType(cacheType)) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } }) } } func BenchmarkGlob100Rules(b *testing.B) { config := `--- mappings:` + duplicateRules(100, ruleTemplateSingleMatchGlob) mappings := []string{ "metric100.a", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkGlob100RulesCached(b *testing.B) { config := `--- mappings:` + duplicateRules(100, ruleTemplateSingleMatchGlob) mappings := []string{ "metric100.a", } for _, cacheType := range []string{"lru", "random"} { b.Run(cacheType, func(b *testing.B) { mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 1000, WithCacheType(cacheType)) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } }) } } func BenchmarkGlob100RulesNoMatch(b *testing.B) { config := `--- mappings:` + duplicateRules(100, ruleTemplateSingleMatchGlob) mappings := []string{ "metricnomatchy.a", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkGlob100RulesNoOrderingNoMatch(b *testing.B) { config := `--- defaults: glob_disable_ordering: true mappings:` + duplicateRules(100, ruleTemplateSingleMatchGlob) mappings := []string{ "metricnomatchy.a", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkRegex100RulesAverage(b *testing.B) { config := `--- defaults: match_type: regex mappings:` + duplicateRules(100, ruleTemplateSingleMatchRegex) mappings := []string{ "metric50.a", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkRegex100RulesWorst(b *testing.B) { config := `--- defaults: match_type: regex mappings:` + duplicateRules(100, ruleTemplateSingleMatchRegex) mappings := []string{ "metric100.a", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkGlob100RulesMultipleCaptures(b *testing.B) { config := `--- mappings:` + duplicateRules(100, ruleTemplateMultipleMatchGlob) mappings := []string{ "metric50.a.b.c.d.e.f.g.h.i.j.k.l", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkGlob100RulesMultipleCapturesCached(b *testing.B) { config := `--- mappings:` + duplicateRules(100, ruleTemplateMultipleMatchGlob) mappings := []string{ "metric50.a.b.c.d.e.f.g.h.i.j.k.l", } for _, cacheType := range []string{"lru", "random"} { b.Run(cacheType, func(b *testing.B) { mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 1000, WithCacheType(cacheType)) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } }) } } func BenchmarkRegex100RulesMultipleCapturesAverage(b *testing.B) { config := `--- defaults: match_type: regex mappings:` + duplicateRules(100, ruleTemplateMultipleMatchRegex) mappings := []string{ "metric50.a.b.c.d.e.f.g.h.i.j.k.l", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkRegex100RulesMultipleCapturesWorst(b *testing.B) { config := `--- defaults: match_type: regex mappings:` + duplicateRules(100, ruleTemplateMultipleMatchRegex) mappings := []string{ "metric100.a.b.c.d.e.f.g.h.i.j.k.l", } mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 0) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } } func BenchmarkRegex100RulesMultipleCapturesWorstCached(b *testing.B) { config := `--- defaults: match_type: regex mappings:` + duplicateRules(100, ruleTemplateMultipleMatchRegex) mappings := []string{ "metric100.a.b.c.d.e.f.g.h.i.j.k.l", } for _, cacheType := range []string{"lru", "random"} { b.Run(cacheType, func(b *testing.B) { mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 1000, WithCacheType(cacheType)) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } }) } } func duplicateMetrics(count int, template string) []string { var out []string for i := 0; i < count; i++ { out = append(out, fmt.Sprintf(template, i)) } return out } func BenchmarkGlob100RulesCached100Metrics(b *testing.B) { config := `--- mappings:` + duplicateRules(100, ruleTemplateSingleMatchGlob) mappings := duplicateMetrics(100, "metric100") for _, cacheType := range []string{"lru", "random"} { b.Run(cacheType, func(b *testing.B) { mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 1000, WithCacheType(cacheType)) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } }) } } func BenchmarkGlob100RulesCached100MetricsSmallCache(b *testing.B) { // This benchmark is the worst case for the LRU cache. // The cache is smaller than the total number of metrics and // we iterate linearly through the metrics, so we will // constantly evict cache entries. config := `--- mappings:` + duplicateRules(100, ruleTemplateSingleMatchGlob) mappings := duplicateMetrics(100, "metric100") for _, cacheType := range []string{"lru", "random"} { b.Run(cacheType, func(b *testing.B) { mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 50, WithCacheType(cacheType)) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } }) } } func BenchmarkGlob100RulesCached100MetricsRandomSmallCache(b *testing.B) { // Slighly more realistic benchmark with a smaller cache. // Randomly match metrics so we should have some cache hits. config := `--- mappings:` + duplicateRules(100, ruleTemplateSingleMatchGlob) base := duplicateMetrics(100, "metric100") var mappings []string for i := 0; i < 10; i++ { mappings = append(mappings, base...) } r := rand.New(rand.NewSource(42)) r.Shuffle(len(mappings), func(i, j int) { mappings[i], mappings[j] = mappings[j], mappings[i] }) for _, cacheType := range []string{"lru", "random"} { b.Run(cacheType, func(b *testing.B) { mapper := MetricMapper{} err := mapper.InitFromYAMLString(config, 50, WithCacheType(cacheType)) if err != nil { b.Fatalf("Config load error: %s %s", config, err) } b.ResetTimer() for j := 0; j < b.N; j++ { for _, metric := range mappings { mapper.GetMapping(metric, MetricTypeCounter) } } }) } }