Squashed 'vendor/ruvector/' content from commit b64c2172

git-subtree-dir: vendor/ruvector
git-subtree-split: b64c21726f2bb37286d9ee36a7869fef60cc6900

crates/ruvector-math/benches/spectral.rs

@@ -0,0 +1,99 @@
+//! Benchmarks for spectral methods
+
+use criterion::{black_box, criterion_group, criterion_main, BenchmarkId, Criterion};
+use ruvector_math::spectral::{ChebyshevExpansion, ChebyshevPolynomial};
+
+fn bench_chebyshev_eval(c: &mut Criterion) {
+    let mut group = c.benchmark_group("chebyshev_eval");
+
+    for degree in [10, 20, 50, 100] {
+        group.bench_with_input(
+            BenchmarkId::new("degree", degree),
+            &degree,
+            |bench, &deg| {
+                let poly = ChebyshevPolynomial::new(deg);
+                bench.iter(|| poly.eval(black_box(0.5)));
+            },
+        );
+    }
+
+    group.finish();
+}
+
+fn bench_chebyshev_eval_all(c: &mut Criterion) {
+    let mut group = c.benchmark_group("chebyshev_eval_all");
+
+    for degree in [10, 20, 50, 100] {
+        group.bench_with_input(
+            BenchmarkId::new("degree", degree),
+            &degree,
+            |bench, &deg| {
+                bench.iter(|| ChebyshevPolynomial::eval_all(black_box(0.5), black_box(deg)));
+            },
+        );
+    }
+
+    group.finish();
+}
+
+fn bench_chebyshev_expansion(c: &mut Criterion) {
+    let mut group = c.benchmark_group("chebyshev_expansion");
+
+    for degree in [10, 20, 50] {
+        group.bench_with_input(
+            BenchmarkId::new("from_function", degree),
+            &degree,
+            |bench, &deg| {
+                bench.iter(|| ChebyshevExpansion::from_function(|x| x.sin(), black_box(deg)));
+            },
+        );
+    }
+
+    group.finish();
+}
+
+fn bench_heat_kernel(c: &mut Criterion) {
+    let mut group = c.benchmark_group("heat_kernel");
+
+    for degree in [10, 20, 50] {
+        for t in [0.1, 1.0, 10.0] {
+            group.bench_with_input(
+                BenchmarkId::new(format!("deg={}_t={}", degree, t), degree),
+                &(degree, t),
+                |bench, &(deg, t)| {
+                    bench.iter(|| ChebyshevExpansion::heat_kernel(black_box(t), black_box(deg)));
+                },
+            );
+        }
+    }
+
+    group.finish();
+}
+
+fn bench_clenshaw_eval(c: &mut Criterion) {
+    let mut group = c.benchmark_group("clenshaw_eval");
+
+    for degree in [10, 20, 50, 100] {
+        let expansion = ChebyshevExpansion::from_function(|x| x.sin(), degree);
+
+        group.bench_with_input(
+            BenchmarkId::new("degree", degree),
+            &expansion,
+            |bench, exp| {
+                bench.iter(|| exp.eval(black_box(0.5)));
+            },
+        );
+    }
+
+    group.finish();
+}
+
+criterion_group!(
+    benches,
+    bench_chebyshev_eval,
+    bench_chebyshev_eval_all,
+    bench_chebyshev_expansion,
+    bench_heat_kernel,
+    bench_clenshaw_eval,
+);
+criterion_main!(benches);