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| -rw-r--r-- | vendor/indexmap/benches/bench.rs | 763 |
1 files changed, 763 insertions, 0 deletions
diff --git a/vendor/indexmap/benches/bench.rs b/vendor/indexmap/benches/bench.rs new file mode 100644 index 0000000..a4e8e21 --- /dev/null +++ b/vendor/indexmap/benches/bench.rs @@ -0,0 +1,763 @@ +#![feature(test)] + +extern crate test; +#[macro_use] +extern crate lazy_static; + +use fnv::FnvHasher; +use std::hash::BuildHasherDefault; +use std::hash::Hash; +type FnvBuilder = BuildHasherDefault<FnvHasher>; + +use test::black_box; +use test::Bencher; + +use indexmap::IndexMap; + +use std::collections::HashMap; + +use rand::rngs::SmallRng; +use rand::seq::SliceRandom; +use rand::SeedableRng; + +/// Use a consistently seeded Rng for benchmark stability +fn small_rng() -> SmallRng { + let seed = u64::from_le_bytes(*b"indexmap"); + SmallRng::seed_from_u64(seed) +} + +#[bench] +fn new_hashmap(b: &mut Bencher) { + b.iter(|| HashMap::<String, String>::new()); +} + +#[bench] +fn new_indexmap(b: &mut Bencher) { + b.iter(|| IndexMap::<String, String>::new()); +} + +#[bench] +fn with_capacity_10e5_hashmap(b: &mut Bencher) { + b.iter(|| HashMap::<String, String>::with_capacity(10_000)); +} + +#[bench] +fn with_capacity_10e5_indexmap(b: &mut Bencher) { + b.iter(|| IndexMap::<String, String>::with_capacity(10_000)); +} + +#[bench] +fn insert_hashmap_10_000(b: &mut Bencher) { + let c = 10_000; + b.iter(|| { + let mut map = HashMap::with_capacity(c); + for x in 0..c { + map.insert(x, ()); + } + map + }); +} + +#[bench] +fn insert_indexmap_10_000(b: &mut Bencher) { + let c = 10_000; + b.iter(|| { + let mut map = IndexMap::with_capacity(c); + for x in 0..c { + map.insert(x, ()); + } + map + }); +} + +#[bench] +fn insert_hashmap_string_10_000(b: &mut Bencher) { + let c = 10_000; + b.iter(|| { + let mut map = HashMap::with_capacity(c); + for x in 0..c { + map.insert(x.to_string(), ()); + } + map + }); +} + +#[bench] +fn insert_indexmap_string_10_000(b: &mut Bencher) { + let c = 10_000; + b.iter(|| { + let mut map = IndexMap::with_capacity(c); + for x in 0..c { + map.insert(x.to_string(), ()); + } + map + }); +} + +#[bench] +fn insert_hashmap_str_10_000(b: &mut Bencher) { + let c = 10_000; + let ss = Vec::from_iter((0..c).map(|x| x.to_string())); + b.iter(|| { + let mut map = HashMap::with_capacity(c); + for key in &ss { + map.insert(&key[..], ()); + } + map + }); +} + +#[bench] +fn insert_indexmap_str_10_000(b: &mut Bencher) { + let c = 10_000; + let ss = Vec::from_iter((0..c).map(|x| x.to_string())); + b.iter(|| { + let mut map = IndexMap::with_capacity(c); + for key in &ss { + map.insert(&key[..], ()); + } + map + }); +} + +#[bench] +fn insert_hashmap_int_bigvalue_10_000(b: &mut Bencher) { + let c = 10_000; + let value = [0u64; 10]; + b.iter(|| { + let mut map = HashMap::with_capacity(c); + for i in 0..c { + map.insert(i, value); + } + map + }); +} + +#[bench] +fn insert_indexmap_int_bigvalue_10_000(b: &mut Bencher) { + let c = 10_000; + let value = [0u64; 10]; + b.iter(|| { + let mut map = IndexMap::with_capacity(c); + for i in 0..c { + map.insert(i, value); + } + map + }); +} + +#[bench] +fn insert_hashmap_100_000(b: &mut Bencher) { + let c = 100_000; + b.iter(|| { + let mut map = HashMap::with_capacity(c); + for x in 0..c { + map.insert(x, ()); + } + map + }); +} + +#[bench] +fn insert_indexmap_100_000(b: &mut Bencher) { + let c = 100_000; + b.iter(|| { + let mut map = IndexMap::with_capacity(c); + for x in 0..c { + map.insert(x, ()); + } + map + }); +} + +#[bench] +fn insert_hashmap_150(b: &mut Bencher) { + let c = 150; + b.iter(|| { + let mut map = HashMap::with_capacity(c); + for x in 0..c { + map.insert(x, ()); + } + map + }); +} + +#[bench] +fn insert_indexmap_150(b: &mut Bencher) { + let c = 150; + b.iter(|| { + let mut map = IndexMap::with_capacity(c); + for x in 0..c { + map.insert(x, ()); + } + map + }); +} + +#[bench] +fn entry_hashmap_150(b: &mut Bencher) { + let c = 150; + b.iter(|| { + let mut map = HashMap::with_capacity(c); + for x in 0..c { + map.entry(x).or_insert(()); + } + map + }); +} + +#[bench] +fn entry_indexmap_150(b: &mut Bencher) { + let c = 150; + b.iter(|| { + let mut map = IndexMap::with_capacity(c); + for x in 0..c { + map.entry(x).or_insert(()); + } + map + }); +} + +#[bench] +fn iter_sum_hashmap_10_000(b: &mut Bencher) { + let c = 10_000; + let mut map = HashMap::with_capacity(c); + let len = c - c / 10; + for x in 0..len { + map.insert(x, ()); + } + assert_eq!(map.len(), len); + b.iter(|| map.keys().sum::<usize>()); +} + +#[bench] +fn iter_sum_indexmap_10_000(b: &mut Bencher) { + let c = 10_000; + let mut map = IndexMap::with_capacity(c); + let len = c - c / 10; + for x in 0..len { + map.insert(x, ()); + } + assert_eq!(map.len(), len); + b.iter(|| map.keys().sum::<usize>()); +} + +#[bench] +fn iter_black_box_hashmap_10_000(b: &mut Bencher) { + let c = 10_000; + let mut map = HashMap::with_capacity(c); + let len = c - c / 10; + for x in 0..len { + map.insert(x, ()); + } + assert_eq!(map.len(), len); + b.iter(|| { + for &key in map.keys() { + black_box(key); + } + }); +} + +#[bench] +fn iter_black_box_indexmap_10_000(b: &mut Bencher) { + let c = 10_000; + let mut map = IndexMap::with_capacity(c); + let len = c - c / 10; + for x in 0..len { + map.insert(x, ()); + } + assert_eq!(map.len(), len); + b.iter(|| { + for &key in map.keys() { + black_box(key); + } + }); +} + +fn shuffled_keys<I>(iter: I) -> Vec<I::Item> +where + I: IntoIterator, +{ + let mut v = Vec::from_iter(iter); + let mut rng = small_rng(); + v.shuffle(&mut rng); + v +} + +#[bench] +fn lookup_hashmap_10_000_exist(b: &mut Bencher) { + let c = 10_000; + let mut map = HashMap::with_capacity(c); + let keys = shuffled_keys(0..c); + for &key in &keys { + map.insert(key, 1); + } + b.iter(|| { + let mut found = 0; + for key in 5000..c { + found += map.get(&key).is_some() as i32; + } + found + }); +} + +#[bench] +fn lookup_hashmap_10_000_noexist(b: &mut Bencher) { + let c = 10_000; + let mut map = HashMap::with_capacity(c); + let keys = shuffled_keys(0..c); + for &key in &keys { + map.insert(key, 1); + } + b.iter(|| { + let mut found = 0; + for key in c..15000 { + found += map.get(&key).is_some() as i32; + } + found + }); +} + +#[bench] +fn lookup_indexmap_10_000_exist(b: &mut Bencher) { + let c = 10_000; + let mut map = IndexMap::with_capacity(c); + let keys = shuffled_keys(0..c); + for &key in &keys { + map.insert(key, 1); + } + b.iter(|| { + let mut found = 0; + for key in 5000..c { + found += map.get(&key).is_some() as i32; + } + found + }); +} + +#[bench] +fn lookup_indexmap_10_000_noexist(b: &mut Bencher) { + let c = 10_000; + let mut map = IndexMap::with_capacity(c); + let keys = shuffled_keys(0..c); + for &key in &keys { + map.insert(key, 1); + } + b.iter(|| { + let mut found = 0; + for key in c..15000 { + found += map.get(&key).is_some() as i32; + } + found + }); +} + +// number of items to look up +const LOOKUP_MAP_SIZE: u32 = 100_000_u32; +const LOOKUP_SAMPLE_SIZE: u32 = 5000; +const SORT_MAP_SIZE: usize = 10_000; + +// use lazy_static so that comparison benchmarks use the exact same inputs +lazy_static! { + static ref KEYS: Vec<u32> = shuffled_keys(0..LOOKUP_MAP_SIZE); +} + +lazy_static! { + static ref HMAP_100K: HashMap<u32, u32> = { + let c = LOOKUP_MAP_SIZE; + let mut map = HashMap::with_capacity(c as usize); + let keys = &*KEYS; + for &key in keys { + map.insert(key, key); + } + map + }; +} + +lazy_static! { + static ref IMAP_100K: IndexMap<u32, u32> = { + let c = LOOKUP_MAP_SIZE; + let mut map = IndexMap::with_capacity(c as usize); + let keys = &*KEYS; + for &key in keys { + map.insert(key, key); + } + map + }; +} + +lazy_static! { + static ref IMAP_SORT_U32: IndexMap<u32, u32> = { + let mut map = IndexMap::with_capacity(SORT_MAP_SIZE); + for &key in &KEYS[..SORT_MAP_SIZE] { + map.insert(key, key); + } + map + }; +} +lazy_static! { + static ref IMAP_SORT_S: IndexMap<String, String> = { + let mut map = IndexMap::with_capacity(SORT_MAP_SIZE); + for &key in &KEYS[..SORT_MAP_SIZE] { + map.insert(format!("{:^16x}", &key), String::new()); + } + map + }; +} + +#[bench] +fn lookup_hashmap_100_000_multi(b: &mut Bencher) { + let map = &*HMAP_100K; + b.iter(|| { + let mut found = 0; + for key in 0..LOOKUP_SAMPLE_SIZE { + found += map.get(&key).is_some() as u32; + } + found + }); +} + +#[bench] +fn lookup_indexmap_100_000_multi(b: &mut Bencher) { + let map = &*IMAP_100K; + b.iter(|| { + let mut found = 0; + for key in 0..LOOKUP_SAMPLE_SIZE { + found += map.get(&key).is_some() as u32; + } + found + }); +} + +// inorder: Test looking up keys in the same order as they were inserted +#[bench] +fn lookup_hashmap_100_000_inorder_multi(b: &mut Bencher) { + let map = &*HMAP_100K; + let keys = &*KEYS; + b.iter(|| { + let mut found = 0; + for key in &keys[0..LOOKUP_SAMPLE_SIZE as usize] { + found += map.get(key).is_some() as u32; + } + found + }); +} + +#[bench] +fn lookup_indexmap_100_000_inorder_multi(b: &mut Bencher) { + let map = &*IMAP_100K; + let keys = &*KEYS; + b.iter(|| { + let mut found = 0; + for key in &keys[0..LOOKUP_SAMPLE_SIZE as usize] { + found += map.get(key).is_some() as u32; + } + found + }); +} + +#[bench] +fn lookup_hashmap_100_000_single(b: &mut Bencher) { + let map = &*HMAP_100K; + let mut iter = (0..LOOKUP_MAP_SIZE + LOOKUP_SAMPLE_SIZE).cycle(); + b.iter(|| { + let key = iter.next().unwrap(); + map.get(&key).is_some() + }); +} + +#[bench] +fn lookup_indexmap_100_000_single(b: &mut Bencher) { + let map = &*IMAP_100K; + let mut iter = (0..LOOKUP_MAP_SIZE + LOOKUP_SAMPLE_SIZE).cycle(); + b.iter(|| { + let key = iter.next().unwrap(); + map.get(&key).is_some() + }); +} + +const GROW_SIZE: usize = 100_000; +type GrowKey = u32; + +// Test grow/resize without preallocation +#[bench] +fn grow_fnv_hashmap_100_000(b: &mut Bencher) { + b.iter(|| { + let mut map: HashMap<_, _, FnvBuilder> = HashMap::default(); + for x in 0..GROW_SIZE { + map.insert(x as GrowKey, x as GrowKey); + } + map + }); +} + +#[bench] +fn grow_fnv_indexmap_100_000(b: &mut Bencher) { + b.iter(|| { + let mut map: IndexMap<_, _, FnvBuilder> = IndexMap::default(); + for x in 0..GROW_SIZE { + map.insert(x as GrowKey, x as GrowKey); + } + map + }); +} + +const MERGE: u64 = 10_000; +#[bench] +fn hashmap_merge_simple(b: &mut Bencher) { + let first_map: HashMap<u64, _> = (0..MERGE).map(|i| (i, ())).collect(); + let second_map: HashMap<u64, _> = (MERGE..MERGE * 2).map(|i| (i, ())).collect(); + b.iter(|| { + let mut merged = first_map.clone(); + merged.extend(second_map.iter().map(|(&k, &v)| (k, v))); + merged + }); +} + +#[bench] +fn hashmap_merge_shuffle(b: &mut Bencher) { + let first_map: HashMap<u64, _> = (0..MERGE).map(|i| (i, ())).collect(); + let second_map: HashMap<u64, _> = (MERGE..MERGE * 2).map(|i| (i, ())).collect(); + let mut v = Vec::new(); + let mut rng = small_rng(); + b.iter(|| { + let mut merged = first_map.clone(); + v.extend(second_map.iter().map(|(&k, &v)| (k, v))); + v.shuffle(&mut rng); + merged.extend(v.drain(..)); + + merged + }); +} + +#[bench] +fn indexmap_merge_simple(b: &mut Bencher) { + let first_map: IndexMap<u64, _> = (0..MERGE).map(|i| (i, ())).collect(); + let second_map: IndexMap<u64, _> = (MERGE..MERGE * 2).map(|i| (i, ())).collect(); + b.iter(|| { + let mut merged = first_map.clone(); + merged.extend(second_map.iter().map(|(&k, &v)| (k, v))); + merged + }); +} + +#[bench] +fn indexmap_merge_shuffle(b: &mut Bencher) { + let first_map: IndexMap<u64, _> = (0..MERGE).map(|i| (i, ())).collect(); + let second_map: IndexMap<u64, _> = (MERGE..MERGE * 2).map(|i| (i, ())).collect(); + let mut v = Vec::new(); + let mut rng = small_rng(); + b.iter(|| { + let mut merged = first_map.clone(); + v.extend(second_map.iter().map(|(&k, &v)| (k, v))); + v.shuffle(&mut rng); + merged.extend(v.drain(..)); + + merged + }); +} + +#[bench] +fn swap_remove_indexmap_100_000(b: &mut Bencher) { + let map = IMAP_100K.clone(); + let mut keys = Vec::from_iter(map.keys().copied()); + let mut rng = small_rng(); + keys.shuffle(&mut rng); + + b.iter(|| { + let mut map = map.clone(); + for key in &keys { + map.swap_remove(key); + } + assert_eq!(map.len(), 0); + map + }); +} + +#[bench] +fn shift_remove_indexmap_100_000_few(b: &mut Bencher) { + let map = IMAP_100K.clone(); + let mut keys = Vec::from_iter(map.keys().copied()); + let mut rng = small_rng(); + keys.shuffle(&mut rng); + keys.truncate(50); + + b.iter(|| { + let mut map = map.clone(); + for key in &keys { + map.shift_remove(key); + } + assert_eq!(map.len(), IMAP_100K.len() - keys.len()); + map + }); +} + +#[bench] +fn shift_remove_indexmap_2_000_full(b: &mut Bencher) { + let mut keys = KEYS[..2_000].to_vec(); + let mut map = IndexMap::with_capacity(keys.len()); + for &key in &keys { + map.insert(key, key); + } + let mut rng = small_rng(); + keys.shuffle(&mut rng); + + b.iter(|| { + let mut map = map.clone(); + for key in &keys { + map.shift_remove(key); + } + assert_eq!(map.len(), 0); + map + }); +} + +#[bench] +fn pop_indexmap_100_000(b: &mut Bencher) { + let map = IMAP_100K.clone(); + + b.iter(|| { + let mut map = map.clone(); + while !map.is_empty() { + map.pop(); + } + assert_eq!(map.len(), 0); + map + }); +} + +#[bench] +fn few_retain_indexmap_100_000(b: &mut Bencher) { + let map = IMAP_100K.clone(); + + b.iter(|| { + let mut map = map.clone(); + map.retain(|k, _| *k % 7 == 0); + map + }); +} + +#[bench] +fn few_retain_hashmap_100_000(b: &mut Bencher) { + let map = HMAP_100K.clone(); + + b.iter(|| { + let mut map = map.clone(); + map.retain(|k, _| *k % 7 == 0); + map + }); +} + +#[bench] +fn half_retain_indexmap_100_000(b: &mut Bencher) { + let map = IMAP_100K.clone(); + + b.iter(|| { + let mut map = map.clone(); + map.retain(|k, _| *k % 2 == 0); + map + }); +} + +#[bench] +fn half_retain_hashmap_100_000(b: &mut Bencher) { + let map = HMAP_100K.clone(); + + b.iter(|| { + let mut map = map.clone(); + map.retain(|k, _| *k % 2 == 0); + map + }); +} + +#[bench] +fn many_retain_indexmap_100_000(b: &mut Bencher) { + let map = IMAP_100K.clone(); + + b.iter(|| { + let mut map = map.clone(); + map.retain(|k, _| *k % 100 != 0); + map + }); +} + +#[bench] +fn many_retain_hashmap_100_000(b: &mut Bencher) { + let map = HMAP_100K.clone(); + + b.iter(|| { + let mut map = map.clone(); + map.retain(|k, _| *k % 100 != 0); + map + }); +} + +// simple sort impl for comparison +pub fn simple_sort<K: Ord + Hash, V>(m: &mut IndexMap<K, V>) { + let mut ordered: Vec<_> = m.drain(..).collect(); + ordered.sort_by(|left, right| left.0.cmp(&right.0)); + m.extend(ordered); +} + +#[bench] +fn indexmap_sort_s(b: &mut Bencher) { + let map = IMAP_SORT_S.clone(); + + // there's a map clone there, but it's still useful to profile this + b.iter(|| { + let mut map = map.clone(); + map.sort_keys(); + map + }); +} + +#[bench] +fn indexmap_simple_sort_s(b: &mut Bencher) { + let map = IMAP_SORT_S.clone(); + + // there's a map clone there, but it's still useful to profile this + b.iter(|| { + let mut map = map.clone(); + simple_sort(&mut map); + map + }); +} + +#[bench] +fn indexmap_sort_u32(b: &mut Bencher) { + let map = IMAP_SORT_U32.clone(); + + // there's a map clone there, but it's still useful to profile this + b.iter(|| { + let mut map = map.clone(); + map.sort_keys(); + map + }); +} + +#[bench] +fn indexmap_simple_sort_u32(b: &mut Bencher) { + let map = IMAP_SORT_U32.clone(); + + // there's a map clone there, but it's still useful to profile this + b.iter(|| { + let mut map = map.clone(); + simple_sort(&mut map); + map + }); +} + +// measure the fixed overhead of cloning in sort benchmarks +#[bench] +fn indexmap_clone_for_sort_s(b: &mut Bencher) { + let map = IMAP_SORT_S.clone(); + + b.iter(|| map.clone()); +} + +#[bench] +fn indexmap_clone_for_sort_u32(b: &mut Bencher) { + let map = IMAP_SORT_U32.clone(); + + b.iter(|| map.clone()); +} |