Merge commit 'd803bfe2b1fe7f5e219e50ac20d6801a0a58ac75' as 'vendor/ruvector'

vendor/ruvector/examples/vibecast-7sense/crates/sevensense-audio/benches/spectrogram_bench.rs

@@ -0,0 +1,74 @@
+//! Benchmarks for spectrogram computation.
+
+use criterion::{black_box, criterion_group, criterion_main, BenchmarkId, Criterion};
+use sevensense_audio::spectrogram::{MelSpectrogram, SpectrogramConfig};
+use std::f32::consts::PI;
+
+fn generate_sine_wave(freq: f32, duration_s: f32, sample_rate: u32) -> Vec<f32> {
+    let num_samples = (duration_s * sample_rate as f32) as usize;
+    (0..num_samples)
+        .map(|i| {
+            let t = i as f32 / sample_rate as f32;
+            (2.0 * PI * freq * t).sin()
+        })
+        .collect()
+}
+
+fn benchmark_spectrogram(c: &mut Criterion) {
+    let mut group = c.benchmark_group("spectrogram");
+
+    // Test different audio durations
+    for duration in [1.0, 2.0, 5.0, 10.0] {
+        let samples = generate_sine_wave(1000.0, duration, 32000);
+        let config = SpectrogramConfig::default();
+
+        group.bench_with_input(
+            BenchmarkId::new("compute", format!("{}s", duration)),
+            &samples,
+            |b, samples| {
+                b.iter(|| {
+                    MelSpectrogram::compute(black_box(samples), black_box(config.clone()))
+                });
+            },
+        );
+    }
+
+    group.finish();
+}
+
+fn benchmark_5s_segment(c: &mut Criterion) {
+    let samples = generate_sine_wave(2000.0, 5.0, 32000);
+    let config = SpectrogramConfig::for_5s_segment();
+
+    c.bench_function("spectrogram_5s_segment", |b| {
+        b.iter(|| MelSpectrogram::compute(black_box(&samples), black_box(config.clone())));
+    });
+}
+
+fn benchmark_mel_bands(c: &mut Criterion) {
+    let mut group = c.benchmark_group("mel_bands");
+    let samples = generate_sine_wave(1000.0, 2.0, 32000);
+
+    // Test different mel band counts
+    for n_mels in [64, 128, 256] {
+        let config = SpectrogramConfig {
+            n_mels,
+            ..SpectrogramConfig::default()
+        };
+
+        group.bench_with_input(
+            BenchmarkId::new("n_mels", n_mels),
+            &samples,
+            |b, samples| {
+                b.iter(|| {
+                    MelSpectrogram::compute(black_box(samples), black_box(config.clone()))
+                });
+            },
+        );
+    }
+
+    group.finish();
+}
+
+criterion_group!(benches, benchmark_spectrogram, benchmark_5s_segment, benchmark_mel_bands);
+criterion_main!(benches);