use criterion::{criterion_group, criterion_main, BenchmarkId, Criterion, Throughput};
use rayon::prelude::*;
use std::collections::HashMap;
use std::sync::RwLock;
const ITER: u64 = 2 * 1024;
fn task_insert_rwlock_std_u64_u64() -> RwLock<HashMap<u64, u64>> {
let map = RwLock::new(HashMap::with_capacity(ITER as usize));
(0..ITER).into_par_iter().for_each(|i| {
map.write().unwrap().insert(i, i + 7);
});
map
}
fn insert_rwlock_std_u64_u64(c: &mut Criterion) {
let mut group = c.benchmark_group("insert_rwlock_std_u64_u64");
group.throughput(Throughput::Elements(ITER as u64));
let max = num_cpus::get();
for threads in &[1, max] {
group.bench_with_input(
BenchmarkId::from_parameter(threads),
&threads,
|b, &threads| {
let pool = rayon::ThreadPoolBuilder::new()
.num_threads(*threads)
.build()
.unwrap();
pool.install(|| b.iter(|| task_insert_rwlock_std_u64_u64()));
},
);
}
group.finish();
}
fn task_get_rwlock_std_u64_u64(map: &RwLock<HashMap<u64, u64>>) {
(0..ITER).into_par_iter().for_each(|i| {
assert_eq!(*map.read().unwrap().get(&i).unwrap(), i + 7);
});
}
fn get_rwlock_std_u64_u64(c: &mut Criterion) {
let mut group = c.benchmark_group("get_rwlock_std_u64_u64");
group.throughput(Throughput::Elements(ITER as u64));
let max = num_cpus::get();
for threads in &[1, max] {
let map = task_insert_rwlock_std_u64_u64();
group.bench_with_input(
BenchmarkId::from_parameter(threads),
&threads,
|b, &threads| {
let pool = rayon::ThreadPoolBuilder::new()
.num_threads(*threads)
.build()
.unwrap();
pool.install(|| b.iter(|| task_get_rwlock_std_u64_u64(&map)));
},
);
}
group.finish();
}
criterion_group!(benches, insert_rwlock_std_u64_u64, get_rwlock_std_u64_u64);
criterion_main!(benches);