1use core::mem::swap;
 2use criterion::{black_box, criterion_group, criterion_main, Criterion};
 3use miden_crypto::{merkle::SimpleSmt, Felt, Word};
 4use rand_utils::prng_array;
 5
 6fn smt_rpo(c: &mut Criterion) {
 7    // setup trees
 8
 9    let mut seed = [0u8; 32];
10    let mut trees = vec![];
11
12    for depth in 14..=20 {
13        let leaves = ((1 << depth) - 1) as u64;
14        for count in [1, leaves / 2, leaves] {
15            let entries: Vec<_> = (0..count)
16                .map(|i| {
17                    let word = generate_word(&mut seed);
18                    (i, word)
19                })
20                .collect();
21            let tree = SimpleSmt::with_leaves(depth, entries).unwrap();
22            trees.push((tree, count));
23        }
24    }
25
26    let leaf = generate_word(&mut seed);
27
28    // benchmarks
29
30    let mut insert = c.benchmark_group(format!("smt update_leaf"));
31
32    for (tree, count) in trees.iter_mut() {
33        let depth = tree.depth();
34        let key = *count >> 2;
35        insert.bench_with_input(
36            format!("simple smt(depth:{depth},count:{count})"),
37            &(key, leaf),
38            |b, (key, leaf)| {
39                b.iter(|| {
40                    tree.update_leaf(black_box(*key), black_box(*leaf)).unwrap();
41                });
42            },
43        );
44    }
45
46    insert.finish();
47
48    let mut path = c.benchmark_group(format!("smt get_leaf_path"));
49
50    for (tree, count) in trees.iter_mut() {
51        let depth = tree.depth();
52        let key = *count >> 2;
53        path.bench_with_input(
54            format!("simple smt(depth:{depth},count:{count})"),
55            &key,
56            |b, key| {
57                b.iter(|| {
58                    tree.get_leaf_path(black_box(*key)).unwrap();
59                });
60            },
61        );
62    }
63
64    path.finish();
65}
66
67criterion_group!(smt_group, smt_rpo);
68criterion_main!(smt_group);
69
70// HELPER FUNCTIONS
71// --------------------------------------------------------------------------------------------
72
73fn generate_word(seed: &mut [u8; 32]) -> Word {
74    swap(seed, &mut prng_array(*seed));
75    let nums: [u64; 4] = prng_array(*seed);
76    [Felt::new(nums[0]), Felt::new(nums[1]), Felt::new(nums[2]), Felt::new(nums[3])]
77}