rusty-numbers/benches/stock_functions.rs

use criterion::{black_box, criterion_group, criterion_main, BenchmarkId, Criterion};
use rusty_numbers::{factorial, fibonacci, it_factorial, mem_fibonacci, rec_fibonacci};

fn bench_factorial(c: &mut Criterion) {
    let mut group = c.benchmark_group("Factorials");

    for i in [0usize, 5, 10, 15, 20, 25, 30, 34].iter() {
        group.bench_with_input(BenchmarkId::new("Recursive naive", i), i, |b, i| {
            b.iter(|| factorial(*i))
        });
        group.bench_with_input(BenchmarkId::new("Iterative", i), i, |b, i| {
            b.iter(|| it_factorial(*i))
        });
    }
    group.finish();
}

fn bench_fibonacci(c: &mut Criterion) {
    let mut group = c.benchmark_group("Fibonacci");

    for i in [0usize, 5, 10, 15, 20, 30].iter() {
        group.bench_with_input(BenchmarkId::new("Recursive memoized", i), i, |b, i| {
            b.iter(|| mem_fibonacci(*i))
        });
        // group.bench_with_input(BenchmarkId::new("Recursive naive", i), i, |b, i| b.iter(|| rec_fibonacci(*i)));
        group.bench_with_input(BenchmarkId::new("Iterative", i), i, |b, i| {
            b.iter(|| fibonacci(*i))
        });
    }

    group.finish();

    let mut group = c.benchmark_group("Recursive Fibonacci");
    for i in [0usize, 5, 10, 15, 20, 25, 26, 27, 28, 29, 30].iter() {
        group.bench_with_input(BenchmarkId::new("Naive Recursive", i), i, |b, i| {
            b.iter(|| rec_fibonacci(*i))
        });
    }
    group.finish();
}

criterion_group!(benches, bench_factorial, bench_fibonacci);
criterion_main!(benches);