Fun with benchmarking. Reverted to using built-in trigonometric functions!

benches/trig.rs

@@ -0,0 +1,16 @@
+use physarum::trig;
+
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+
+fn bench_cos_appr(c: &mut Criterion) {
+    c.bench_function("Approximate cosine", |b| {
+        b.iter(|| trig::cos(black_box(1.0)))
+    });
+}
+
+fn bench_cos_exact(c: &mut Criterion) {
+    c.bench_function("Exact cosine", |b| b.iter(|| f32::cos(black_box(1.0))));
+}
+
+criterion_group!(benches, bench_cos_appr, bench_cos_exact);
+criterion_main!(benches);