Add simple benchmarking tests

Cargo.toml

@@ -20,4 +20,9 @@ ark-std = "0.5"
 gs-ppe = { git = "https://github.com/AlvinHon/gs-ppe"}
 
 [dev-dependencies]
-ark-bls12-381 = "0.5"
+ark-bls12-381 = "0.5"
+criterion = "0.5"
+
+[[bench]]
+name = "bench"
+harness = false

benches/bench.rs

@@ -0,0 +1,82 @@
+use criterion::{criterion_group, criterion_main, Criterion};
+
+use ark_bls12_381::Bls12_381 as E;
+use ark_ec::pairing::Pairing;
+use ark_std::{test_rng, UniformRand};
+use commuting_signature::{Params, Signer};
+
+type Fr = <E as Pairing>::ScalarField;
+
+criterion_group!(
+    benches,
+    bench_sign,
+    bench_verify,
+    bench_verify_ciphertexts,
+    bench_sign_on_ciphertexts
+);
+
+criterion_main!(benches);
+
+pub fn bench_sign(c: &mut Criterion) {
+    let rng = &mut test_rng();
+
+    let params = Params::<E>::rand(rng);
+    let signer = Signer::rand(rng);
+    let value = Fr::rand(rng);
+
+    c.bench_function("sign", |b| {
+        b.iter(|| {
+            signer.sign(rng, &params, value);
+        })
+    });
+}
+
+pub fn bench_verify(c: &mut Criterion) {
+    let rng = &mut test_rng();
+
+    let params = Params::<E>::rand(rng);
+    let signer = Signer::rand(rng);
+    let verifier = signer.verifier(&params);
+    let value = Fr::rand(rng);
+
+    let (message, signature, _) = signer.sign(rng, &params, value);
+
+    c.bench_function("verify", |b| {
+        b.iter(|| {
+            verifier.verify(&params, &message, &signature);
+        })
+    });
+}
+
+pub fn bench_verify_ciphertexts(c: &mut Criterion) {
+    let rng = &mut test_rng();
+
+    let params = Params::<E>::rand(rng);
+    let signer = Signer::rand(rng);
+    let verifier = signer.verifier(&params);
+    let value = Fr::rand(rng);
+
+    let (_, _, ciphertexts) = signer.sign(rng, &params, value);
+
+    c.bench_function("verify_ciphertexts", |b| {
+        b.iter(|| {
+            verifier.verify_ciphertexts(&params, &ciphertexts);
+        })
+    });
+}
+
+pub fn bench_sign_on_ciphertexts(c: &mut Criterion) {
+    let rng = &mut test_rng();
+
+    let params = Params::<E>::rand(rng);
+    let signer = Signer::rand(rng);
+    let value = Fr::rand(rng);
+
+    let (_, _, ciphertexts) = signer.sign(rng, &params, value);
+
+    c.bench_function("sign_on_ciphertexts", |b| {
+        b.iter(|| {
+            signer.sign_on_ciphertexts(rng, &params, &ciphertexts);
+        })
+    });
+}