Get benchmarks running again.

benches/parabole.rs

@@ -63,19 +63,28 @@ impl Individual for Parabole {
 }
 
 fn criterion_benchmark(c: &mut Criterion) {
+    c.bench_function("calculate", move |b| {
         let initial = (0..1000)
-        .map(|i| Parabole { x: i as f64 })
+            .map(|i| Parabole { x: f64::from(i) })
+            .collect::<Vec<_>>();
+
+        let mut simulation = Simulation::with_population(initial);
+
+        b.iter(|| {
+            simulation.calculate();
+        });
+    });
+
+    c.bench_function("evolve", move |b| {
+        let initial = (0..1000)
+            .map(|i| Parabole { x: f64::from(i) })
             .collect::<Vec<_>>();
 
         let population_size = initial.len();
 
         let mut simulation = Simulation::with_population(initial);
 
-    c.bench_function("calculate", |b| b.iter(|| {
-        simulation.calculate();
-    }));
-
-    c.bench_function("evolve", |b| b.iter(|| {
+        b.iter(|| {
             simulation.evolve(|parents, population| {
                 // Mate top 10 to get 5 children.
                 parents
@@ -120,7 +129,8 @@ fn criterion_benchmark(c: &mut Criterion) {
             });
 
             simulation.population.truncate(population_size);
-    }));
+        });
+    });
 }
 
 criterion_group!(benches, criterion_benchmark);