Add benchmark for vcos

Author: termoshtt

intel-mkl-sys/Cargo.toml

@@ -6,3 +6,10 @@ edition = "2018"
 
 [dependencies.intel-mkl-src]
 path = "../intel-mkl-src"
+
+[dev-dependencies]
+criterion = "*"
+
+[[bench]]
+name = "cos"
+harness = false

intel-mkl-sys/benches/cos.rs

@@ -0,0 +1,29 @@
+#[macro_use]
+extern crate criterion;
+
+use criterion::Criterion;
+
+fn criterion_benchmark(c: &mut Criterion) {
+    for &n in &[100, 1000, 10000] {
+        c.bench_function(&format!("cos{}", n), |b| {
+            let in_ = vec![0.0_f64; n];
+            let mut out = vec![0.0_f64; n];
+            b.iter(|| {
+                for i in 0..n {
+                    out[i] = in_[i].cos();
+                }
+            })
+        });
+
+        c.bench_function(&format!("vcos{}", n), |b| {
+            let in_ = vec![0.0_f64; n];
+            let mut out = vec![0.0_f64; n];
+            b.iter(|| unsafe {
+                intel_mkl_sys::vdCos(n as i32, in_.as_ptr(), out.as_mut_ptr());
+            })
+        });
+    }
+}
+
+criterion_group!(benches, criterion_benchmark);
+criterion_main!(benches);