diff --git a/dsp/benches/cossin.rs b/dsp/benches/cossin.rs
index f082c7b..cbd0499 100644
--- a/dsp/benches/cossin.rs
+++ b/dsp/benches/cossin.rs
@@ -2,7 +2,11 @@ use criterion::{black_box, criterion_group, criterion_main, Criterion};
 use dsp::trig::cossin;
 
 fn cossin_bench(c: &mut Criterion) {
-    c.bench_function("cossin(0)", |b| b.iter(|| cossin(black_box(0))));
+    let z = -0x7304_2531_i32;
+    c.bench_function("cossin(z)", |b| b.iter(|| cossin(black_box(z))));
+    c.bench_function("(z as f32).sin_cos()", |b| {
+        b.iter(|| (black_box(z) as f32).sin_cos())
+    });
 }
 
 criterion_group!(benches, cossin_bench);