| 1 | package extension |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "sort" |
| 6 | "testing" |
| 7 | "time" |
| 8 | ) |
| 9 | |
| 10 | // BenchmarkExtensionKernelStartup measures the immutable snapshot assembly |
| 11 | // portion of startup with no extensions and with a representative 64-entry |
| 12 | // interceptor catalog. Process spawn and sidecar handshake latency are |
| 13 | // intentionally excluded and should be measured by extension authors. |
| 14 | func BenchmarkExtensionKernelStartup(b *testing.B) { |
| 15 | b.Run("NoExtensions", func(b *testing.B) { |
| 16 | benchmarkBuildLatency(b, NewBuilder().WithSystemPrompt("stable prompt")) |
| 17 | }) |
| 18 | |
| 19 | contributions := make([]Contribution, 0, 64) |
| 20 | for i := 0; i < 64; i++ { |
| 21 | contributions = append(contributions, Contribution{ |
| 22 | Kind: KindInterceptor, |
| 23 | ID: string(PointToolBefore), |
| 24 | Source: ContributionSource{ |
| 25 | Scope: ScopePlugin, |
| 26 | PluginID: "plugin-" + benchmarkIndex(i), |
| 27 | }, |
| 28 | Priority: i%21 - 10, |
| 29 | }) |
| 30 | } |
| 31 | builder := NewBuilder().WithSystemPrompt("stable prompt").AddContributor(ContributorFunc{ |
| 32 | ContributorName: "benchmark", |
| 33 | Fn: func(context.Context) ([]Contribution, error) { |
| 34 | return contributions, nil |
| 35 | }, |
| 36 | }) |
| 37 | b.Run("64Interceptors", func(b *testing.B) { benchmarkBuildLatency(b, builder) }) |
| 38 | } |
| 39 | |
| 40 | func benchmarkIndex(i int) string { |
| 41 | const digits = "0123456789abcdef" |
| 42 | return string([]byte{digits[(i>>4)&15], digits[i&15]}) |
| 43 | } |
| 44 | |
| 45 | func benchmarkBuildLatency(b *testing.B, builder *Builder) { |
| 46 | b.Helper() |
| 47 | b.ReportAllocs() |
| 48 | const maxSamples = 100_000 |
| 49 | samples := make([]int64, 0, maxSamples) |
| 50 | for b.Loop() { |
| 51 | start := time.Now() |
| 52 | _, runtimeSet, err := builder.Build(context.Background()) |
| 53 | if err != nil { |
| 54 | b.Fatal(err) |
| 55 | } |
| 56 | if err := runtimeSet.Close(); err != nil { |
| 57 | b.Fatal(err) |
| 58 | } |
| 59 | if len(samples) < maxSamples { |
| 60 | samples = append(samples, time.Since(start).Nanoseconds()) |
| 61 | } |
| 62 | } |
| 63 | b.StopTimer() |
| 64 | sort.Slice(samples, func(i, j int) bool { return samples[i] < samples[j] }) |
| 65 | if len(samples) == 0 { |
| 66 | return |
| 67 | } |
| 68 | b.ReportMetric(float64(samples[(len(samples)-1)*50/100]), "p50-ns/op") |
| 69 | b.ReportMetric(float64(samples[(len(samples)-1)*95/100]), "p95-ns/op") |
| 70 | } |
| 71 |