| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package metrix |
| 4 | |
| 5 | import ( |
| 6 | "strconv" |
| 7 | "testing" |
| 8 | ) |
| 9 | |
| 10 | // Baseline results (2026-02-13, darwin/arm64, Apple M4 Pro): |
| 11 | // Command: |
| 12 | // |
| 13 | // go test ./pkg/metrix -run '^$' -bench 'CollectStyleSnapshot' -benchmem |
| 14 | // |
| 15 | // BenchmarkCollectStyleSnapshot/lazy_declare_3_metrics-14 764806 1544 ns/op 3912 B/op 57 allocs/op |
| 16 | // BenchmarkCollectStyleSnapshot/cached_handles_3_metrics-14 940884 1286 ns/op 3208 B/op 44 allocs/op |
| 17 | // BenchmarkCollectStyleSnapshot/lazy_declare_20_metrics-14 138122 8734 ns/op 20792 B/op 291 allocs/op |
| 18 | // BenchmarkCollectStyleSnapshot/cached_handles_20_metrics-14 167974 7197 ns/op 16960 B/op 227 allocs/op |
| 19 | // |
| 20 | // Keep this block updated when changing metrix write/declaration paths. |
| 21 | func BenchmarkCollectStyleSnapshot(b *testing.B) { |
| 22 | tests := map[string]struct { |
| 23 | totalMetrics int |
| 24 | lazyDeclare bool |
| 25 | }{ |
| 26 | "lazy_declare_3_metrics": { |
| 27 | totalMetrics: 3, |
| 28 | lazyDeclare: true, |
| 29 | }, |
| 30 | "cached_handles_3_metrics": { |
| 31 | totalMetrics: 3, |
| 32 | lazyDeclare: false, |
| 33 | }, |
| 34 | "lazy_declare_20_metrics": { |
| 35 | totalMetrics: 20, |
| 36 | lazyDeclare: true, |
| 37 | }, |
| 38 | "cached_handles_20_metrics": { |
| 39 | totalMetrics: 20, |
| 40 | lazyDeclare: false, |
| 41 | }, |
| 42 | } |
| 43 | |
| 44 | for name, tc := range tests { |
| 45 | b.Run(name, func(b *testing.B) { |
| 46 | s := NewCollectorStore() |
| 47 | cc := benchmarkCycleController(b, s) |
| 48 | base := s.Write().SnapshotMeter("bench.collect") |
| 49 | instanceLS := base.LabelSet(Label{Key: "instance", Value: "collector-A"}) |
| 50 | |
| 51 | gaugeNames, counterNames := benchmarkMetricNames(tc.totalMetrics) |
| 52 | var cachedGauges []SnapshotGauge |
| 53 | var cachedCounters []SnapshotCounter |
| 54 | |
| 55 | if !tc.lazyDeclare { |
| 56 | sm := s.Write().SnapshotMeter("bench.collect").WithLabelSet(instanceLS) |
| 57 | cachedGauges = make([]SnapshotGauge, 0, len(gaugeNames)) |
| 58 | cachedCounters = make([]SnapshotCounter, 0, len(counterNames)) |
| 59 | for _, n := range gaugeNames { |
| 60 | cachedGauges = append(cachedGauges, sm.Gauge(n)) |
| 61 | } |
| 62 | for _, n := range counterNames { |
| 63 | cachedCounters = append(cachedCounters, sm.Counter(n)) |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | b.ReportAllocs() |
| 68 | b.ResetTimer() |
| 69 | for i := 0; i < b.N; i++ { |
| 70 | cc.BeginCycle() |
| 71 | if tc.lazyDeclare { |
| 72 | sm := s.Write().SnapshotMeter("bench.collect").WithLabelSet(instanceLS) |
| 73 | for j, n := range gaugeNames { |
| 74 | sm.Gauge(n).Observe(SampleValue(j + i)) |
| 75 | } |
| 76 | for j, n := range counterNames { |
| 77 | sm.Counter(n).ObserveTotal(SampleValue(1000 + j + i)) |
| 78 | } |
| 79 | } else { |
| 80 | for j := range cachedGauges { |
| 81 | cachedGauges[j].Observe(SampleValue(j + i)) |
| 82 | } |
| 83 | for j := range cachedCounters { |
| 84 | cachedCounters[j].ObserveTotal(SampleValue(1000 + j + i)) |
| 85 | } |
| 86 | } |
| 87 | cc.CommitCycleSuccess() |
| 88 | } |
| 89 | }) |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | func benchmarkMetricNames(total int) (gauges []string, counters []string) { |
| 94 | if total < 1 { |
| 95 | return []string{"gauge0"}, nil |
| 96 | } |
| 97 | gaugeCount := total / 2 |
| 98 | counterCount := total - gaugeCount |
| 99 | if gaugeCount == 0 { |
| 100 | gaugeCount = 1 |
| 101 | counterCount = total - gaugeCount |
| 102 | } |
| 103 | if counterCount == 0 { |
| 104 | counterCount = 1 |
| 105 | gaugeCount = total - counterCount |
| 106 | } |
| 107 | |
| 108 | gauges = make([]string, 0, gaugeCount) |
| 109 | counters = make([]string, 0, counterCount) |
| 110 | for i := 0; i < gaugeCount; i++ { |
| 111 | gauges = append(gauges, "gauge_"+strconv.Itoa(i)) |
| 112 | } |
| 113 | for i := 0; i < counterCount; i++ { |
| 114 | counters = append(counters, "counter_"+strconv.Itoa(i)) |
| 115 | } |
| 116 | return gauges, counters |
| 117 | } |