diff --git a/lib/primes/Cargo.toml b/lib/primes/Cargo.toml
index 4a8f4d3..0bdd18b 100644
--- a/lib/primes/Cargo.toml
+++ b/lib/primes/Cargo.toml
@@ -7,3 +7,11 @@ edition = "2021"
 
 [dependencies]
 num = "*"
+
+[dev-dependencies]
+criterion = "*"
+
+
+[[bench]]
+name = "benchmark"
+harness = false
diff --git a/lib/primes/benches/benchmark.rs b/lib/primes/benches/benchmark.rs
new file mode 100644
index 0000000..626be48
--- /dev/null
+++ b/lib/primes/benches/benchmark.rs
@@ -0,0 +1,14 @@
+extern crate primes;
+
+use criterion::{criterion_group, criterion_main, Criterion};
+
+use crate::primes::Primes;
+
+fn bench_primes_between_10e5_and_10e6(c: &mut Criterion) {
+    c.bench_function("primes 10e5 to 10e6", |b| {
+        b.iter(|| Primes::get_between(100_000, 1_000_000))
+    });
+}
+
+criterion_group!(benches, bench_primes_between_10e5_and_10e6);
+criterion_main!(benches);
diff --git a/lib/primes/src/lib.rs b/lib/primes/src/lib.rs
index f99018d..5fecff4 100644
--- a/lib/primes/src/lib.rs
+++ b/lib/primes/src/lib.rs
@@ -154,24 +154,4 @@ mod test {
         let primes = Primes::get_between(2, 100_000);
         assert_eq!(primes.len(), 9_592);
     }
-
-    #[ignore]
-    #[test]
-    fn test_performance_1() {
-        let _ = Primes::get_between(100_000, 999_999);
-    }
-
-    #[ignore]
-    #[test]
-    fn test_performance_2() {
-        let primes = Primes::get_between(2, 10_000_000);
-        assert_eq!(primes.len(), 664_579);
-    }
-
-    #[ignore]
-    #[test]
-    fn test_performance_3() {
-        let primes = Primes::get_between(2, 1_000_000_000);
-        assert_eq!(primes.len(), 50_847_534);
-    }
 }