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test: more realistic benchmarks comparison #31

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75 changes: 52 additions & 23 deletions benches/operations.rs
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Original file line number Diff line number Diff line change
@@ -1,7 +1,46 @@
use criterion::{black_box, criterion_group, criterion_main, Criterion};
use tailcall_chunk::Chunk;

const N: usize = 10000;
const N: usize = 100;

/// A simple immutable vector implementation.
#[derive(Clone)]
struct Vector<T> {
vec: Vec<T>,
}

impl<A: Clone> Vector<A> {
fn push(self, value: A) -> Self {
let mut vec = self.vec.clone();
vec.push(value);
Self { vec }
}

fn concat(self, other: Self) -> Self {
let mut vec = self.vec.clone();
vec.extend(other.vec.iter().cloned());
Self { vec }
}

fn prepend(&self, value: A) -> Self {
let mut vec = Vec::with_capacity(self.vec.len() + 1);
vec.push(value);
vec.extend(self.vec.iter().cloned());
Self { vec }
}

fn new() -> Self {
Self { vec: Vec::new() }
}
}

impl<A> FromIterator<A> for Vector<A> {
fn from_iter<I: IntoIterator<Item = A>>(iter: I) -> Self {
Self {
vec: iter.into_iter().collect(),
}
}
}

fn bench_operations(c: &mut Criterion) {
// Benchmark append operations
Expand All @@ -18,9 +57,9 @@ fn bench_operations(c: &mut Criterion) {
})
.bench_function("vec_append", |b| {
b.iter(|| {
let mut vec = Vec::new();
let mut vec = Vector::new();
for i in 0..10000 {
vec.push(i.to_string());
vec = vec.push(i.to_string());
}
black_box(vec);
})
Expand All @@ -39,9 +78,9 @@ fn bench_operations(c: &mut Criterion) {
})
.bench_function("vec_prepend", |b| {
b.iter(|| {
let mut vec = Vec::new();
let mut vec = Vector::new();
for i in 0..10000 {
vec.insert(0, i.to_string());
vec = vec.prepend(i.to_string());
}
black_box(vec);
})
Expand All @@ -52,41 +91,31 @@ fn bench_operations(c: &mut Criterion) {
.bench_function("chunk_concat", |b| {
let chunk1: Chunk<_> = (0..5000).map(|i| i.to_string()).collect();
let chunk2: Chunk<_> = (5000..10000).map(|i| i.to_string()).collect();
b.iter(|| {
black_box(chunk1.clone().concat(chunk2.clone()));
})
b.iter(|| black_box(chunk1.clone().concat(chunk2.clone())))
})
.bench_function("vec_concat", |b| {
let vec1: Vec<_> = (0..5000).map(|i| i.to_string()).collect();
let vec2: Vec<_> = (5000..10000).map(|i| i.to_string()).collect();
b.iter(|| {
let mut result = vec1.clone();
result.extend(vec2.iter().cloned());
black_box(result)
})
let vec1: Vector<_> = (0..5000).map(|i| i.to_string()).collect();
let vec2: Vector<_> = (5000..10000).map(|i| i.to_string()).collect();
b.iter(|| black_box(vec1.clone().concat(vec2.clone())))
});

// Benchmark clone operations
c.benchmark_group("clone")
.bench_function("chunk_clone", |b| {
let chunk: Chunk<_> = (0..10000).collect();
b.iter(|| {
black_box(chunk.clone());
})
b.iter(|| black_box(chunk.clone()))
})
.bench_function("vec_clone", |b| {
let vec: Vec<_> = (0..10000).collect();
b.iter(|| {
black_box(vec.clone());
})
let vec: Vector<_> = (0..10000).collect();
b.iter(|| black_box(vec.clone()))
});

// Benchmark from_iter operation
c.benchmark_group("from_iter")
.bench_function("Chunk", |b| {
b.iter(|| Chunk::from_iter((0..N).into_iter()));
})
.bench_function("Vec", |b| b.iter(|| Vec::from_iter((0..N).into_iter())));
.bench_function("Vec", |b| b.iter(|| Vector::from_iter((0..N).into_iter())));
}

criterion_group!(benches, bench_operations);
Expand Down