diff options
Diffstat (limited to '')
-rw-r--r-- | library/alloc/benches/btree/map.rs | 585 | ||||
-rw-r--r-- | library/alloc/benches/btree/mod.rs | 2 | ||||
-rw-r--r-- | library/alloc/benches/btree/set.rs | 224 |
3 files changed, 811 insertions, 0 deletions
diff --git a/library/alloc/benches/btree/map.rs b/library/alloc/benches/btree/map.rs new file mode 100644 index 000000000..1f6b87fb0 --- /dev/null +++ b/library/alloc/benches/btree/map.rs @@ -0,0 +1,585 @@ +use std::collections::BTreeMap; +use std::iter::Iterator; +use std::ops::RangeBounds; +use std::vec::Vec; + +use rand::{seq::SliceRandom, Rng}; +use test::{black_box, Bencher}; + +macro_rules! map_insert_rand_bench { + ($name: ident, $n: expr, $map: ident) => { + #[bench] + pub fn $name(b: &mut Bencher) { + let n: usize = $n; + let mut map = $map::new(); + // setup + let mut rng = crate::bench_rng(); + + for _ in 0..n { + let i = rng.gen::<usize>() % n; + map.insert(i, i); + } + + // measure + b.iter(|| { + let k = rng.gen::<usize>() % n; + map.insert(k, k); + map.remove(&k); + }); + black_box(map); + } + }; +} + +macro_rules! map_insert_seq_bench { + ($name: ident, $n: expr, $map: ident) => { + #[bench] + pub fn $name(b: &mut Bencher) { + let mut map = $map::new(); + let n: usize = $n; + // setup + for i in 0..n { + map.insert(i * 2, i * 2); + } + + // measure + let mut i = 1; + b.iter(|| { + map.insert(i, i); + map.remove(&i); + i = (i + 2) % n; + }); + black_box(map); + } + }; +} + +macro_rules! map_from_iter_rand_bench { + ($name: ident, $n: expr, $map: ident) => { + #[bench] + pub fn $name(b: &mut Bencher) { + let n: usize = $n; + // setup + let mut rng = crate::bench_rng(); + let mut vec = Vec::with_capacity(n); + + for _ in 0..n { + let i = rng.gen::<usize>() % n; + vec.push((i, i)); + } + + // measure + b.iter(|| { + let map: $map<_, _> = vec.iter().copied().collect(); + black_box(map); + }); + } + }; +} + +macro_rules! map_from_iter_seq_bench { + ($name: ident, $n: expr, $map: ident) => { + #[bench] + pub fn $name(b: &mut Bencher) { + let n: usize = $n; + // setup + let mut vec = Vec::with_capacity(n); + + for i in 0..n { + vec.push((i, i)); + } + + // measure + b.iter(|| { + let map: $map<_, _> = vec.iter().copied().collect(); + black_box(map); + }); + } + }; +} + +macro_rules! map_find_rand_bench { + ($name: ident, $n: expr, $map: ident) => { + #[bench] + pub fn $name(b: &mut Bencher) { + let mut map = $map::new(); + let n: usize = $n; + + // setup + let mut rng = crate::bench_rng(); + let mut keys: Vec<_> = (0..n).map(|_| rng.gen::<usize>() % n).collect(); + + for &k in &keys { + map.insert(k, k); + } + + keys.shuffle(&mut rng); + + // measure + let mut i = 0; + b.iter(|| { + let t = map.get(&keys[i]); + i = (i + 1) % n; + black_box(t); + }) + } + }; +} + +macro_rules! map_find_seq_bench { + ($name: ident, $n: expr, $map: ident) => { + #[bench] + pub fn $name(b: &mut Bencher) { + let mut map = $map::new(); + let n: usize = $n; + + // setup + for i in 0..n { + map.insert(i, i); + } + + // measure + let mut i = 0; + b.iter(|| { + let x = map.get(&i); + i = (i + 1) % n; + black_box(x); + }) + } + }; +} + +map_insert_rand_bench! {insert_rand_100, 100, BTreeMap} +map_insert_rand_bench! {insert_rand_10_000, 10_000, BTreeMap} + +map_insert_seq_bench! {insert_seq_100, 100, BTreeMap} +map_insert_seq_bench! {insert_seq_10_000, 10_000, BTreeMap} + +map_from_iter_rand_bench! {from_iter_rand_100, 100, BTreeMap} +map_from_iter_rand_bench! {from_iter_rand_10_000, 10_000, BTreeMap} + +map_from_iter_seq_bench! {from_iter_seq_100, 100, BTreeMap} +map_from_iter_seq_bench! {from_iter_seq_10_000, 10_000, BTreeMap} + +map_find_rand_bench! {find_rand_100, 100, BTreeMap} +map_find_rand_bench! {find_rand_10_000, 10_000, BTreeMap} + +map_find_seq_bench! {find_seq_100, 100, BTreeMap} +map_find_seq_bench! {find_seq_10_000, 10_000, BTreeMap} + +fn bench_iteration(b: &mut Bencher, size: i32) { + let mut map = BTreeMap::<i32, i32>::new(); + let mut rng = crate::bench_rng(); + + for _ in 0..size { + map.insert(rng.gen(), rng.gen()); + } + + b.iter(|| { + for entry in &map { + black_box(entry); + } + }); +} + +#[bench] +pub fn iteration_20(b: &mut Bencher) { + bench_iteration(b, 20); +} + +#[bench] +pub fn iteration_1000(b: &mut Bencher) { + bench_iteration(b, 1000); +} + +#[bench] +pub fn iteration_100000(b: &mut Bencher) { + bench_iteration(b, 100000); +} + +fn bench_iteration_mut(b: &mut Bencher, size: i32) { + let mut map = BTreeMap::<i32, i32>::new(); + let mut rng = crate::bench_rng(); + + for _ in 0..size { + map.insert(rng.gen(), rng.gen()); + } + + b.iter(|| { + for kv in map.iter_mut() { + black_box(kv); + } + }); +} + +#[bench] +pub fn iteration_mut_20(b: &mut Bencher) { + bench_iteration_mut(b, 20); +} + +#[bench] +pub fn iteration_mut_1000(b: &mut Bencher) { + bench_iteration_mut(b, 1000); +} + +#[bench] +pub fn iteration_mut_100000(b: &mut Bencher) { + bench_iteration_mut(b, 100000); +} + +fn bench_first_and_last_nightly(b: &mut Bencher, size: i32) { + let map: BTreeMap<_, _> = (0..size).map(|i| (i, i)).collect(); + b.iter(|| { + for _ in 0..10 { + black_box(map.first_key_value()); + black_box(map.last_key_value()); + } + }); +} + +fn bench_first_and_last_stable(b: &mut Bencher, size: i32) { + let map: BTreeMap<_, _> = (0..size).map(|i| (i, i)).collect(); + b.iter(|| { + for _ in 0..10 { + black_box(map.iter().next()); + black_box(map.iter().next_back()); + } + }); +} + +#[bench] +pub fn first_and_last_0_nightly(b: &mut Bencher) { + bench_first_and_last_nightly(b, 0); +} + +#[bench] +pub fn first_and_last_0_stable(b: &mut Bencher) { + bench_first_and_last_stable(b, 0); +} + +#[bench] +pub fn first_and_last_100_nightly(b: &mut Bencher) { + bench_first_and_last_nightly(b, 100); +} + +#[bench] +pub fn first_and_last_100_stable(b: &mut Bencher) { + bench_first_and_last_stable(b, 100); +} + +#[bench] +pub fn first_and_last_10k_nightly(b: &mut Bencher) { + bench_first_and_last_nightly(b, 10_000); +} + +#[bench] +pub fn first_and_last_10k_stable(b: &mut Bencher) { + bench_first_and_last_stable(b, 10_000); +} + +const BENCH_RANGE_SIZE: i32 = 145; +const BENCH_RANGE_COUNT: i32 = BENCH_RANGE_SIZE * (BENCH_RANGE_SIZE - 1) / 2; + +fn bench_range<F, R>(b: &mut Bencher, f: F) +where + F: Fn(i32, i32) -> R, + R: RangeBounds<i32>, +{ + let map: BTreeMap<_, _> = (0..BENCH_RANGE_SIZE).map(|i| (i, i)).collect(); + b.iter(|| { + let mut c = 0; + for i in 0..BENCH_RANGE_SIZE { + for j in i + 1..BENCH_RANGE_SIZE { + let _ = black_box(map.range(f(i, j))); + c += 1; + } + } + debug_assert_eq!(c, BENCH_RANGE_COUNT); + }); +} + +#[bench] +pub fn range_included_excluded(b: &mut Bencher) { + bench_range(b, |i, j| i..j); +} + +#[bench] +pub fn range_included_included(b: &mut Bencher) { + bench_range(b, |i, j| i..=j); +} + +#[bench] +pub fn range_included_unbounded(b: &mut Bencher) { + bench_range(b, |i, _| i..); +} + +#[bench] +pub fn range_unbounded_unbounded(b: &mut Bencher) { + bench_range(b, |_, _| ..); +} + +fn bench_iter(b: &mut Bencher, repeats: i32, size: i32) { + let map: BTreeMap<_, _> = (0..size).map(|i| (i, i)).collect(); + b.iter(|| { + for _ in 0..repeats { + let _ = black_box(map.iter()); + } + }); +} + +/// Contrast range_unbounded_unbounded with `iter()`. +#[bench] +pub fn range_unbounded_vs_iter(b: &mut Bencher) { + bench_iter(b, BENCH_RANGE_COUNT, BENCH_RANGE_SIZE); +} + +#[bench] +pub fn iter_0(b: &mut Bencher) { + bench_iter(b, 1_000, 0); +} + +#[bench] +pub fn iter_1(b: &mut Bencher) { + bench_iter(b, 1_000, 1); +} + +#[bench] +pub fn iter_100(b: &mut Bencher) { + bench_iter(b, 1_000, 100); +} + +#[bench] +pub fn iter_10k(b: &mut Bencher) { + bench_iter(b, 1_000, 10_000); +} + +#[bench] +pub fn iter_1m(b: &mut Bencher) { + bench_iter(b, 1_000, 1_000_000); +} + +const FAT: usize = 256; + +// The returned map has small keys and values. +// Benchmarks on it have a counterpart in set.rs with the same keys and no values at all. +fn slim_map(n: usize) -> BTreeMap<usize, usize> { + (0..n).map(|i| (i, i)).collect::<BTreeMap<_, _>>() +} + +// The returned map has small keys and large values. +fn fat_val_map(n: usize) -> BTreeMap<usize, [usize; FAT]> { + (0..n).map(|i| (i, [i; FAT])).collect::<BTreeMap<_, _>>() +} + +#[bench] +pub fn clone_slim_100(b: &mut Bencher) { + let src = slim_map(100); + b.iter(|| src.clone()) +} + +#[bench] +pub fn clone_slim_100_and_clear(b: &mut Bencher) { + let src = slim_map(100); + b.iter(|| src.clone().clear()) +} + +#[bench] +pub fn clone_slim_100_and_drain_all(b: &mut Bencher) { + let src = slim_map(100); + b.iter(|| src.clone().drain_filter(|_, _| true).count()) +} + +#[bench] +pub fn clone_slim_100_and_drain_half(b: &mut Bencher) { + let src = slim_map(100); + b.iter(|| { + let mut map = src.clone(); + assert_eq!(map.drain_filter(|i, _| i % 2 == 0).count(), 100 / 2); + assert_eq!(map.len(), 100 / 2); + }) +} + +#[bench] +pub fn clone_slim_100_and_into_iter(b: &mut Bencher) { + let src = slim_map(100); + b.iter(|| src.clone().into_iter().count()) +} + +#[bench] +pub fn clone_slim_100_and_pop_all(b: &mut Bencher) { + let src = slim_map(100); + b.iter(|| { + let mut map = src.clone(); + while map.pop_first().is_some() {} + map + }); +} + +#[bench] +pub fn clone_slim_100_and_remove_all(b: &mut Bencher) { + let src = slim_map(100); + b.iter(|| { + let mut map = src.clone(); + while let Some(elt) = map.iter().map(|(&i, _)| i).next() { + let v = map.remove(&elt); + debug_assert!(v.is_some()); + } + map + }); +} + +#[bench] +pub fn clone_slim_100_and_remove_half(b: &mut Bencher) { + let src = slim_map(100); + b.iter(|| { + let mut map = src.clone(); + for i in (0..100).step_by(2) { + let v = map.remove(&i); + debug_assert!(v.is_some()); + } + assert_eq!(map.len(), 100 / 2); + map + }) +} + +#[bench] +pub fn clone_slim_10k(b: &mut Bencher) { + let src = slim_map(10_000); + b.iter(|| src.clone()) +} + +#[bench] +pub fn clone_slim_10k_and_clear(b: &mut Bencher) { + let src = slim_map(10_000); + b.iter(|| src.clone().clear()) +} + +#[bench] +pub fn clone_slim_10k_and_drain_all(b: &mut Bencher) { + let src = slim_map(10_000); + b.iter(|| src.clone().drain_filter(|_, _| true).count()) +} + +#[bench] +pub fn clone_slim_10k_and_drain_half(b: &mut Bencher) { + let src = slim_map(10_000); + b.iter(|| { + let mut map = src.clone(); + assert_eq!(map.drain_filter(|i, _| i % 2 == 0).count(), 10_000 / 2); + assert_eq!(map.len(), 10_000 / 2); + }) +} + +#[bench] +pub fn clone_slim_10k_and_into_iter(b: &mut Bencher) { + let src = slim_map(10_000); + b.iter(|| src.clone().into_iter().count()) +} + +#[bench] +pub fn clone_slim_10k_and_pop_all(b: &mut Bencher) { + let src = slim_map(10_000); + b.iter(|| { + let mut map = src.clone(); + while map.pop_first().is_some() {} + map + }); +} + +#[bench] +pub fn clone_slim_10k_and_remove_all(b: &mut Bencher) { + let src = slim_map(10_000); + b.iter(|| { + let mut map = src.clone(); + while let Some(elt) = map.iter().map(|(&i, _)| i).next() { + let v = map.remove(&elt); + debug_assert!(v.is_some()); + } + map + }); +} + +#[bench] +pub fn clone_slim_10k_and_remove_half(b: &mut Bencher) { + let src = slim_map(10_000); + b.iter(|| { + let mut map = src.clone(); + for i in (0..10_000).step_by(2) { + let v = map.remove(&i); + debug_assert!(v.is_some()); + } + assert_eq!(map.len(), 10_000 / 2); + map + }) +} + +#[bench] +pub fn clone_fat_val_100(b: &mut Bencher) { + let src = fat_val_map(100); + b.iter(|| src.clone()) +} + +#[bench] +pub fn clone_fat_val_100_and_clear(b: &mut Bencher) { + let src = fat_val_map(100); + b.iter(|| src.clone().clear()) +} + +#[bench] +pub fn clone_fat_val_100_and_drain_all(b: &mut Bencher) { + let src = fat_val_map(100); + b.iter(|| src.clone().drain_filter(|_, _| true).count()) +} + +#[bench] +pub fn clone_fat_val_100_and_drain_half(b: &mut Bencher) { + let src = fat_val_map(100); + b.iter(|| { + let mut map = src.clone(); + assert_eq!(map.drain_filter(|i, _| i % 2 == 0).count(), 100 / 2); + assert_eq!(map.len(), 100 / 2); + }) +} + +#[bench] +pub fn clone_fat_val_100_and_into_iter(b: &mut Bencher) { + let src = fat_val_map(100); + b.iter(|| src.clone().into_iter().count()) +} + +#[bench] +pub fn clone_fat_val_100_and_pop_all(b: &mut Bencher) { + let src = fat_val_map(100); + b.iter(|| { + let mut map = src.clone(); + while map.pop_first().is_some() {} + map + }); +} + +#[bench] +pub fn clone_fat_val_100_and_remove_all(b: &mut Bencher) { + let src = fat_val_map(100); + b.iter(|| { + let mut map = src.clone(); + while let Some(elt) = map.iter().map(|(&i, _)| i).next() { + let v = map.remove(&elt); + debug_assert!(v.is_some()); + } + map + }); +} + +#[bench] +pub fn clone_fat_val_100_and_remove_half(b: &mut Bencher) { + let src = fat_val_map(100); + b.iter(|| { + let mut map = src.clone(); + for i in (0..100).step_by(2) { + let v = map.remove(&i); + debug_assert!(v.is_some()); + } + assert_eq!(map.len(), 100 / 2); + map + }) +} diff --git a/library/alloc/benches/btree/mod.rs b/library/alloc/benches/btree/mod.rs new file mode 100644 index 000000000..095ca5dd2 --- /dev/null +++ b/library/alloc/benches/btree/mod.rs @@ -0,0 +1,2 @@ +mod map; +mod set; diff --git a/library/alloc/benches/btree/set.rs b/library/alloc/benches/btree/set.rs new file mode 100644 index 000000000..3f4b0e0f1 --- /dev/null +++ b/library/alloc/benches/btree/set.rs @@ -0,0 +1,224 @@ +use std::collections::BTreeSet; + +use rand::Rng; +use test::Bencher; + +fn random(n: usize) -> BTreeSet<usize> { + let mut rng = crate::bench_rng(); + let mut set = BTreeSet::new(); + while set.len() < n { + set.insert(rng.gen()); + } + assert_eq!(set.len(), n); + set +} + +fn neg(n: usize) -> BTreeSet<i32> { + let set: BTreeSet<i32> = (-(n as i32)..=-1).collect(); + assert_eq!(set.len(), n); + set +} + +fn pos(n: usize) -> BTreeSet<i32> { + let set: BTreeSet<i32> = (1..=(n as i32)).collect(); + assert_eq!(set.len(), n); + set +} + +fn stagger(n1: usize, factor: usize) -> [BTreeSet<u32>; 2] { + let n2 = n1 * factor; + let mut sets = [BTreeSet::new(), BTreeSet::new()]; + for i in 0..(n1 + n2) { + let b = i % (factor + 1) != 0; + sets[b as usize].insert(i as u32); + } + assert_eq!(sets[0].len(), n1); + assert_eq!(sets[1].len(), n2); + sets +} + +macro_rules! set_bench { + ($name: ident, $set_func: ident, $result_func: ident, $sets: expr) => { + #[bench] + pub fn $name(b: &mut Bencher) { + // setup + let sets = $sets; + + // measure + b.iter(|| sets[0].$set_func(&sets[1]).$result_func()) + } + }; +} + +fn slim_set(n: usize) -> BTreeSet<usize> { + (0..n).collect::<BTreeSet<_>>() +} + +#[bench] +pub fn clone_100(b: &mut Bencher) { + let src = slim_set(100); + b.iter(|| src.clone()) +} + +#[bench] +pub fn clone_100_and_clear(b: &mut Bencher) { + let src = slim_set(100); + b.iter(|| src.clone().clear()) +} + +#[bench] +pub fn clone_100_and_drain_all(b: &mut Bencher) { + let src = slim_set(100); + b.iter(|| src.clone().drain_filter(|_| true).count()) +} + +#[bench] +pub fn clone_100_and_drain_half(b: &mut Bencher) { + let src = slim_set(100); + b.iter(|| { + let mut set = src.clone(); + assert_eq!(set.drain_filter(|i| i % 2 == 0).count(), 100 / 2); + assert_eq!(set.len(), 100 / 2); + }) +} + +#[bench] +pub fn clone_100_and_into_iter(b: &mut Bencher) { + let src = slim_set(100); + b.iter(|| src.clone().into_iter().count()) +} + +#[bench] +pub fn clone_100_and_pop_all(b: &mut Bencher) { + let src = slim_set(100); + b.iter(|| { + let mut set = src.clone(); + while set.pop_first().is_some() {} + set + }); +} + +#[bench] +pub fn clone_100_and_remove_all(b: &mut Bencher) { + let src = slim_set(100); + b.iter(|| { + let mut set = src.clone(); + while let Some(elt) = set.iter().copied().next() { + let ok = set.remove(&elt); + debug_assert!(ok); + } + set + }); +} + +#[bench] +pub fn clone_100_and_remove_half(b: &mut Bencher) { + let src = slim_set(100); + b.iter(|| { + let mut set = src.clone(); + for i in (0..100).step_by(2) { + let ok = set.remove(&i); + debug_assert!(ok); + } + assert_eq!(set.len(), 100 / 2); + set + }) +} + +#[bench] +pub fn clone_10k(b: &mut Bencher) { + let src = slim_set(10_000); + b.iter(|| src.clone()) +} + +#[bench] +pub fn clone_10k_and_clear(b: &mut Bencher) { + let src = slim_set(10_000); + b.iter(|| src.clone().clear()) +} + +#[bench] +pub fn clone_10k_and_drain_all(b: &mut Bencher) { + let src = slim_set(10_000); + b.iter(|| src.clone().drain_filter(|_| true).count()) +} + +#[bench] +pub fn clone_10k_and_drain_half(b: &mut Bencher) { + let src = slim_set(10_000); + b.iter(|| { + let mut set = src.clone(); + assert_eq!(set.drain_filter(|i| i % 2 == 0).count(), 10_000 / 2); + assert_eq!(set.len(), 10_000 / 2); + }) +} + +#[bench] +pub fn clone_10k_and_into_iter(b: &mut Bencher) { + let src = slim_set(10_000); + b.iter(|| src.clone().into_iter().count()) +} + +#[bench] +pub fn clone_10k_and_pop_all(b: &mut Bencher) { + let src = slim_set(10_000); + b.iter(|| { + let mut set = src.clone(); + while set.pop_first().is_some() {} + set + }); +} + +#[bench] +pub fn clone_10k_and_remove_all(b: &mut Bencher) { + let src = slim_set(10_000); + b.iter(|| { + let mut set = src.clone(); + while let Some(elt) = set.iter().copied().next() { + let ok = set.remove(&elt); + debug_assert!(ok); + } + set + }); +} + +#[bench] +pub fn clone_10k_and_remove_half(b: &mut Bencher) { + let src = slim_set(10_000); + b.iter(|| { + let mut set = src.clone(); + for i in (0..10_000).step_by(2) { + let ok = set.remove(&i); + debug_assert!(ok); + } + assert_eq!(set.len(), 10_000 / 2); + set + }) +} + +set_bench! {intersection_100_neg_vs_100_pos, intersection, count, [neg(100), pos(100)]} +set_bench! {intersection_100_neg_vs_10k_pos, intersection, count, [neg(100), pos(10_000)]} +set_bench! {intersection_100_pos_vs_100_neg, intersection, count, [pos(100), neg(100)]} +set_bench! {intersection_100_pos_vs_10k_neg, intersection, count, [pos(100), neg(10_000)]} +set_bench! {intersection_10k_neg_vs_100_pos, intersection, count, [neg(10_000), pos(100)]} +set_bench! {intersection_10k_neg_vs_10k_pos, intersection, count, [neg(10_000), pos(10_000)]} +set_bench! {intersection_10k_pos_vs_100_neg, intersection, count, [pos(10_000), neg(100)]} +set_bench! {intersection_10k_pos_vs_10k_neg, intersection, count, [pos(10_000), neg(10_000)]} +set_bench! {intersection_random_100_vs_100, intersection, count, [random(100), random(100)]} +set_bench! {intersection_random_100_vs_10k, intersection, count, [random(100), random(10_000)]} +set_bench! {intersection_random_10k_vs_100, intersection, count, [random(10_000), random(100)]} +set_bench! {intersection_random_10k_vs_10k, intersection, count, [random(10_000), random(10_000)]} +set_bench! {intersection_staggered_100_vs_100, intersection, count, stagger(100, 1)} +set_bench! {intersection_staggered_10k_vs_10k, intersection, count, stagger(10_000, 1)} +set_bench! {intersection_staggered_100_vs_10k, intersection, count, stagger(100, 100)} +set_bench! {difference_random_100_vs_100, difference, count, [random(100), random(100)]} +set_bench! {difference_random_100_vs_10k, difference, count, [random(100), random(10_000)]} +set_bench! {difference_random_10k_vs_100, difference, count, [random(10_000), random(100)]} +set_bench! {difference_random_10k_vs_10k, difference, count, [random(10_000), random(10_000)]} +set_bench! {difference_staggered_100_vs_100, difference, count, stagger(100, 1)} +set_bench! {difference_staggered_10k_vs_10k, difference, count, stagger(10_000, 1)} +set_bench! {difference_staggered_100_vs_10k, difference, count, stagger(100, 100)} +set_bench! {is_subset_100_vs_100, is_subset, clone, [pos(100), pos(100)]} +set_bench! {is_subset_100_vs_10k, is_subset, clone, [pos(100), pos(10_000)]} +set_bench! {is_subset_10k_vs_100, is_subset, clone, [pos(10_000), pos(100)]} +set_bench! {is_subset_10k_vs_10k, is_subset, clone, [pos(10_000), pos(10_000)]} |