| 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 'VecVsWithLabelsSnapshotGauge' -benchmem |
| 14 | // |
| 15 | // BenchmarkVecVsWithLabelsSnapshotGauge/with_labels_10_series-14 188834 6332 ns/op 13456 B/op 215 allocs/op |
| 16 | // BenchmarkVecVsWithLabelsSnapshotGauge/vec_10_series-14 273654 4356 ns/op 8976 B/op 135 allocs/op |
| 17 | // BenchmarkVecVsWithLabelsSnapshotGauge/with_labels_100_series-14 18757 63167 ns/op 125457 B/op 1934 allocs/op |
| 18 | // BenchmarkVecVsWithLabelsSnapshotGauge/vec_100_series-14 27187 44716 ns/op 80658 B/op 1134 allocs/op |
| 19 | // |
| 20 | // Keep this block updated when changing vec or label-merging write paths. |
| 21 | func BenchmarkVecVsWithLabelsSnapshotGauge(b *testing.B) { |
| 22 | tests := map[string]struct { |
| 23 | seriesCount int |
| 24 | useVec bool |
| 25 | }{ |
| 26 | "with_labels_10_series": { |
| 27 | seriesCount: 10, |
| 28 | useVec: false, |
| 29 | }, |
| 30 | "vec_10_series": { |
| 31 | seriesCount: 10, |
| 32 | useVec: true, |
| 33 | }, |
| 34 | "with_labels_100_series": { |
| 35 | seriesCount: 100, |
| 36 | useVec: false, |
| 37 | }, |
| 38 | "vec_100_series": { |
| 39 | seriesCount: 100, |
| 40 | useVec: true, |
| 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 | states := benchmarkVecStates(tc.seriesCount) |
| 49 | if tc.useVec { |
| 50 | vec := s.Write().SnapshotMeter("bench.vec").Vec("instance", "state").Gauge("workers") |
| 51 | b.ReportAllocs() |
| 52 | b.ResetTimer() |
| 53 | for i := 0; i < b.N; i++ { |
| 54 | cc.BeginCycle() |
| 55 | for _, state := range states { |
| 56 | vec.WithLabelValues("job-a", state).Observe(SampleValue(i)) |
| 57 | } |
| 58 | cc.CommitCycleSuccess() |
| 59 | } |
| 60 | return |
| 61 | } |
| 62 | |
| 63 | sm := s.Write().SnapshotMeter("bench.vec") |
| 64 | b.ReportAllocs() |
| 65 | b.ResetTimer() |
| 66 | for i := 0; i < b.N; i++ { |
| 67 | cc.BeginCycle() |
| 68 | for _, state := range states { |
| 69 | sm.WithLabels( |
| 70 | Label{Key: "instance", Value: "job-a"}, |
| 71 | Label{Key: "state", Value: state}, |
| 72 | ).Gauge("workers").Observe(SampleValue(i)) |
| 73 | } |
| 74 | cc.CommitCycleSuccess() |
| 75 | } |
| 76 | }) |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | func benchmarkVecStates(n int) []string { |
| 81 | if n < 1 { |
| 82 | n = 1 |
| 83 | } |
| 84 | out := make([]string, n) |
| 85 | for i := 0; i < n; i++ { |
| 86 | out[i] = "s" + strconv.Itoa(i) |
| 87 | } |
| 88 | return out |
| 89 | } |