tests: add zk benchmark

tests/bench_zk.rs

@@ -0,0 +1,76 @@
+/* This file is part of DarkFi (https://dark.fi)
+ *
+ * Copyright (C) 2020-2024 Dyne.org foundation
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+use halo2_proofs::{circuit::Value, pasta::Fp};
+use rand::rngs::OsRng;
+
+use darkfi::{
+    zk::{
+        proof::{ProvingKey, VerifyingKey},
+        vm::ZkCircuit,
+        vm_heap::{empty_witnesses, Witness},
+        Proof,
+    },
+    zkas::ZkBinary,
+    Result,
+};
+
+const SAMPLES: u128 = 10;
+
+#[test]
+fn bench_zk() -> Result<()> {
+    let bincode = include_bytes!("../proof/arithmetic.zk.bin");
+    let zkbin = ZkBinary::decode(bincode)?;
+
+    let a = Fp::from(4);
+    let b = Fp::from(110);
+
+    // Values for the proof
+    let prover_witnesses = vec![Witness::Base(Value::known(a)), Witness::Base(Value::known(b))];
+
+    let public_inputs = vec![a + b, a * b, a - b];
+
+    // I tried cargo bench, but there's no way to display k=X for each individual bench
+    for k in 11..20 {
+        println!("Benchmarking k={}", k);
+
+        let circuit = ZkCircuit::new(prover_witnesses.clone(), &zkbin);
+        let proving_key = ProvingKey::build(k, &circuit);
+        let mut total = 0;
+        for _ in 0..SAMPLES {
+            let now = std::time::Instant::now();
+            let _ = Proof::create(&proving_key, &[circuit.clone()], &public_inputs, &mut OsRng)?;
+            total += now.elapsed().as_millis();
+        }
+        println!("Avg proving time: {} ms", total / SAMPLES);
+        let proof = Proof::create(&proving_key, &[circuit], &public_inputs, &mut OsRng)?;
+
+        let verifier_witnesses = empty_witnesses(&zkbin)?;
+        let circuit = ZkCircuit::new(verifier_witnesses, &zkbin);
+        let verifying_key = VerifyingKey::build(k, &circuit);
+        let mut total = 0;
+        for _ in 0..SAMPLES {
+            let now = std::time::Instant::now();
+            proof.verify(&verifying_key, &public_inputs)?;
+            total += now.elapsed().as_millis();
+        }
+        println!("Avg verification time: {} ms", total / SAMPLES);
+    }
+
+    Ok(())
+}