arithmetic::best_multiexp add benchmark

halo2_proofs/Cargo.toml

@@ -31,6 +31,10 @@ harness = false
 name = "hashtocurve"
 harness = false
 
+[[bench]]
+name = "msm"
+harness = false
+
 [[bench]]
 name = "plonk"
 harness = false

halo2_proofs/benches/msm.rs

@@ -0,0 +1,27 @@
+#[macro_use]
+extern crate criterion;
+
+use crate::arithmetic::best_multiexp;
+use crate::pasta::{EqAffine, Fp};
+use crate::poly::commitment::Params;
+use criterion::{BenchmarkId, Criterion};
+use group::ff::Field;
+use halo2_proofs::*;
+use rand_core::OsRng;
+
+fn criterion_benchmark(c: &mut Criterion) {
+    let mut group = c.benchmark_group("msm");
+    for k in 8..16 {
+        group
+            .bench_function(BenchmarkId::new("k", k), |b| {
+                let coeffs = (0..(1 << k)).map(|_| Fp::random(OsRng)).collect::<Vec<_>>();
+                let bases = Params::<EqAffine>::new(k).get_g();
+
+                b.iter(|| best_multiexp(&coeffs, &bases))
+            })
+            .sample_size(30);
+    }
+}
+
+criterion_group!(benches, criterion_benchmark);
+criterion_main!(benches);