Add criterion benchmarking

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benches/aoc.rs

@@ -0,0 +1,10 @@
+use aoc::day01;
+use criterion::{Criterion, criterion_group, criterion_main};
+
+fn day01_benchmark(c: &mut Criterion) {
+    c.bench_function("day01 part1", |b| b.iter(|| day01::part1(day01::INPUT)));
+    c.bench_function("day01 part2", |b| b.iter(|| day01::part2(day01::INPUT)));
+}
+
+criterion_group!(benches, day01_benchmark);
+criterion_main!(benches);