Squashed 'vendor/ruvector/' content from commit b64c2172

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

crates/ruvector-sparse-inference/benches/simd_kernels.rs

@@ -0,0 +1,61 @@
+//! Benchmarks for SIMD kernel performance
+
+use criterion::{black_box, criterion_group, criterion_main, BenchmarkId, Criterion};
+use ruvector_sparse_inference::backend::{cpu::CpuBackend, Backend};
+use ruvector_sparse_inference::sparse::ActivationType;
+
+fn bench_dot_product(c: &mut Criterion) {
+    let backend = CpuBackend;
+    let mut group = c.benchmark_group("dot_product");
+
+    for size in [128, 256, 512, 1024, 2048, 4096].iter() {
+        let a: Vec<f32> = (0..*size).map(|i| i as f32).collect();
+        let b: Vec<f32> = (0..*size).map(|i| (i * 2) as f32).collect();
+
+        group.bench_with_input(BenchmarkId::from_parameter(size), size, |bench, _| {
+            bench.iter(|| black_box(backend.dot_product(black_box(&a), black_box(&b))));
+        });
+    }
+    group.finish();
+}
+
+fn bench_relu(c: &mut Criterion) {
+    let backend = CpuBackend;
+    let mut group = c.benchmark_group("relu");
+
+    for size in [128, 256, 512, 1024, 2048, 4096].iter() {
+        let data: Vec<f32> = (0..*size).map(|i| i as f32 - (*size / 2) as f32).collect();
+
+        group.bench_with_input(BenchmarkId::from_parameter(size), size, |bench, _| {
+            bench.iter(|| {
+                let mut d = data.clone();
+                backend.activation(black_box(&mut d), ActivationType::Relu);
+                black_box(d);
+            });
+        });
+    }
+    group.finish();
+}
+
+fn bench_axpy(c: &mut Criterion) {
+    let backend = CpuBackend;
+    let mut group = c.benchmark_group("axpy");
+
+    for size in [128, 256, 512, 1024, 2048, 4096].iter() {
+        let a: Vec<f32> = (0..*size).map(|i| i as f32).collect();
+        let b: Vec<f32> = (0..*size).map(|i| (i * 2) as f32).collect();
+        let scalar = 2.5f32;
+
+        group.bench_with_input(BenchmarkId::from_parameter(size), size, |bench, _| {
+            bench.iter(|| {
+                let mut a_copy = a.clone();
+                backend.axpy(black_box(&mut a_copy), black_box(&b), black_box(scalar));
+                black_box(a_copy);
+            });
+        });
+    }
+    group.finish();
+}
+
+criterion_group!(benches, bench_dot_product, bench_relu, bench_axpy);
+criterion_main!(benches);