performance_metrics/
performance_metrics.rs

1//! Example: Performance measurement with TestMetrics
2//!
3//! Run with: cargo run --example performance_metrics
4
5use embeddenator_testkit::*;
6use rand::SeedableRng;
7use std::thread;
8use std::time::Duration;
9
10fn main() {
11    println!("=== Embeddenator TestKit - Performance Metrics ===\n");
12
13    // Create test metrics
14    let mut metrics = TestMetrics::new("example_operations");
15
16    // Time a simple operation
17    println!("1. Timing vector generation...");
18    let mut rng = rand::rngs::StdRng::seed_from_u64(42);
19
20    for _ in 0..10 {
21        metrics.time_operation(|| {
22            let _vec = random_sparse_vec(&mut rng, 10000, 200);
23        });
24    }
25
26    println!("   Completed 10 operations");
27    let stats = metrics.timing_stats();
28    println!("   Mean: {:.2}µs", stats.mean_ns / 1000.0);
29    println!("   Median: {:.2}µs", stats.p50_ns as f64 / 1000.0);
30    println!("   P95: {:.2}µs", stats.p95_ns as f64 / 1000.0);
31
32    // Record custom metrics
33    println!("\n2. Recording custom metrics...");
34    metrics.record_metric("accuracy", 0.95);
35    metrics.record_metric("precision", 0.92);
36    metrics.record_metric("recall", 0.89);
37    metrics.inc_op("validation_checks");
38
39    // Record memory usage
40    println!("\n3. Recording memory snapshots...");
41    for i in 1..=5 {
42        metrics.record_memory(i * 1024 * 1024); // Simulate growing memory usage
43    }
44
45    // Display full summary
46    println!("\n4. Full metrics summary:");
47    println!("{}", metrics.summary());
48
49    // Test timing with actual work
50    println!("\n5. Timing with simulated work...");
51    let mut work_metrics = TestMetrics::new("simulated_work");
52
53    for sleep_ms in [1, 2, 5, 10, 20] {
54        work_metrics.time_operation(|| {
55            thread::sleep(Duration::from_millis(sleep_ms));
56        });
57    }
58
59    let work_stats = work_metrics.timing_stats();
60    println!("   Operations: {}", work_stats.count);
61    println!(
62        "   Total time: {:.2}ms",
63        work_stats.total_ns as f64 / 1_000_000.0
64    );
65    println!("   Throughput: {:.2} ops/sec", work_stats.ops_per_sec());
66
67    println!("\n✅ Performance metrics example complete!");
68}
performance_metrics/performance_metrics.rs

performance_metrics/
performance_metrics.rs
