764 lines
17 KiB
Rust
764 lines
17 KiB
Rust
#![feature(test)]
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extern crate test;
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#[macro_use]
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extern crate lazy_static;
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use fnv::FnvHasher;
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use std::hash::BuildHasherDefault;
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use std::hash::Hash;
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type FnvBuilder = BuildHasherDefault<FnvHasher>;
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use test::black_box;
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use test::Bencher;
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use indexmap::IndexMap;
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use std::collections::HashMap;
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use rand::rngs::SmallRng;
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use rand::seq::SliceRandom;
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use rand::SeedableRng;
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/// Use a consistently seeded Rng for benchmark stability
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fn small_rng() -> SmallRng {
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let seed = u64::from_le_bytes(*b"indexmap");
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SmallRng::seed_from_u64(seed)
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}
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#[bench]
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fn new_hashmap(b: &mut Bencher) {
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b.iter(|| HashMap::<String, String>::new());
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}
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#[bench]
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fn new_indexmap(b: &mut Bencher) {
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b.iter(|| IndexMap::<String, String>::new());
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}
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#[bench]
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fn with_capacity_10e5_hashmap(b: &mut Bencher) {
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b.iter(|| HashMap::<String, String>::with_capacity(10_000));
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}
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#[bench]
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fn with_capacity_10e5_indexmap(b: &mut Bencher) {
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b.iter(|| IndexMap::<String, String>::with_capacity(10_000));
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}
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#[bench]
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fn insert_hashmap_10_000(b: &mut Bencher) {
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let c = 10_000;
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b.iter(|| {
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let mut map = HashMap::with_capacity(c);
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for x in 0..c {
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map.insert(x, ());
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}
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map
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});
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}
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#[bench]
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fn insert_indexmap_10_000(b: &mut Bencher) {
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let c = 10_000;
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b.iter(|| {
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let mut map = IndexMap::with_capacity(c);
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for x in 0..c {
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map.insert(x, ());
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}
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map
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});
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}
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#[bench]
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fn insert_hashmap_string_10_000(b: &mut Bencher) {
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let c = 10_000;
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b.iter(|| {
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let mut map = HashMap::with_capacity(c);
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for x in 0..c {
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map.insert(x.to_string(), ());
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}
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map
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});
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}
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#[bench]
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fn insert_indexmap_string_10_000(b: &mut Bencher) {
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let c = 10_000;
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b.iter(|| {
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let mut map = IndexMap::with_capacity(c);
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for x in 0..c {
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map.insert(x.to_string(), ());
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}
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map
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});
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}
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#[bench]
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fn insert_hashmap_str_10_000(b: &mut Bencher) {
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let c = 10_000;
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let ss = Vec::from_iter((0..c).map(|x| x.to_string()));
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b.iter(|| {
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let mut map = HashMap::with_capacity(c);
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for key in &ss {
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map.insert(&key[..], ());
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}
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map
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});
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}
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#[bench]
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fn insert_indexmap_str_10_000(b: &mut Bencher) {
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let c = 10_000;
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let ss = Vec::from_iter((0..c).map(|x| x.to_string()));
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b.iter(|| {
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let mut map = IndexMap::with_capacity(c);
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for key in &ss {
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map.insert(&key[..], ());
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}
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map
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});
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}
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#[bench]
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fn insert_hashmap_int_bigvalue_10_000(b: &mut Bencher) {
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let c = 10_000;
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let value = [0u64; 10];
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b.iter(|| {
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let mut map = HashMap::with_capacity(c);
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for i in 0..c {
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map.insert(i, value);
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}
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map
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});
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}
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#[bench]
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fn insert_indexmap_int_bigvalue_10_000(b: &mut Bencher) {
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let c = 10_000;
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let value = [0u64; 10];
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b.iter(|| {
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let mut map = IndexMap::with_capacity(c);
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for i in 0..c {
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map.insert(i, value);
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}
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map
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});
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}
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#[bench]
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fn insert_hashmap_100_000(b: &mut Bencher) {
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let c = 100_000;
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b.iter(|| {
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let mut map = HashMap::with_capacity(c);
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for x in 0..c {
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map.insert(x, ());
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}
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map
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});
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}
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#[bench]
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fn insert_indexmap_100_000(b: &mut Bencher) {
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let c = 100_000;
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b.iter(|| {
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let mut map = IndexMap::with_capacity(c);
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for x in 0..c {
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map.insert(x, ());
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}
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map
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});
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}
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#[bench]
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fn insert_hashmap_150(b: &mut Bencher) {
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let c = 150;
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b.iter(|| {
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let mut map = HashMap::with_capacity(c);
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for x in 0..c {
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map.insert(x, ());
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}
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map
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});
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}
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#[bench]
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fn insert_indexmap_150(b: &mut Bencher) {
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let c = 150;
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b.iter(|| {
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let mut map = IndexMap::with_capacity(c);
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for x in 0..c {
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map.insert(x, ());
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}
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map
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});
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}
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#[bench]
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fn entry_hashmap_150(b: &mut Bencher) {
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let c = 150;
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b.iter(|| {
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let mut map = HashMap::with_capacity(c);
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for x in 0..c {
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map.entry(x).or_insert(());
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}
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map
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});
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}
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#[bench]
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fn entry_indexmap_150(b: &mut Bencher) {
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let c = 150;
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b.iter(|| {
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let mut map = IndexMap::with_capacity(c);
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for x in 0..c {
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map.entry(x).or_insert(());
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}
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map
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});
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}
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#[bench]
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fn iter_sum_hashmap_10_000(b: &mut Bencher) {
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let c = 10_000;
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let mut map = HashMap::with_capacity(c);
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let len = c - c / 10;
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for x in 0..len {
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map.insert(x, ());
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}
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assert_eq!(map.len(), len);
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b.iter(|| map.keys().sum::<usize>());
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}
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#[bench]
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fn iter_sum_indexmap_10_000(b: &mut Bencher) {
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let c = 10_000;
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let mut map = IndexMap::with_capacity(c);
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let len = c - c / 10;
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for x in 0..len {
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map.insert(x, ());
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}
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assert_eq!(map.len(), len);
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b.iter(|| map.keys().sum::<usize>());
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}
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#[bench]
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fn iter_black_box_hashmap_10_000(b: &mut Bencher) {
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let c = 10_000;
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let mut map = HashMap::with_capacity(c);
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let len = c - c / 10;
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for x in 0..len {
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map.insert(x, ());
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}
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assert_eq!(map.len(), len);
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b.iter(|| {
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for &key in map.keys() {
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black_box(key);
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}
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});
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}
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#[bench]
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fn iter_black_box_indexmap_10_000(b: &mut Bencher) {
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let c = 10_000;
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let mut map = IndexMap::with_capacity(c);
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let len = c - c / 10;
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for x in 0..len {
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map.insert(x, ());
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}
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assert_eq!(map.len(), len);
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b.iter(|| {
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for &key in map.keys() {
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black_box(key);
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}
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});
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}
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fn shuffled_keys<I>(iter: I) -> Vec<I::Item>
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where
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I: IntoIterator,
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{
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let mut v = Vec::from_iter(iter);
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let mut rng = small_rng();
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v.shuffle(&mut rng);
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v
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}
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#[bench]
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fn lookup_hashmap_10_000_exist(b: &mut Bencher) {
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let c = 10_000;
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let mut map = HashMap::with_capacity(c);
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let keys = shuffled_keys(0..c);
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for &key in &keys {
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map.insert(key, 1);
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}
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b.iter(|| {
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let mut found = 0;
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for key in 5000..c {
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found += map.get(&key).is_some() as i32;
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}
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found
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});
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}
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#[bench]
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fn lookup_hashmap_10_000_noexist(b: &mut Bencher) {
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let c = 10_000;
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let mut map = HashMap::with_capacity(c);
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let keys = shuffled_keys(0..c);
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for &key in &keys {
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map.insert(key, 1);
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}
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b.iter(|| {
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let mut found = 0;
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for key in c..15000 {
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found += map.get(&key).is_some() as i32;
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}
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found
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});
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}
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#[bench]
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fn lookup_indexmap_10_000_exist(b: &mut Bencher) {
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let c = 10_000;
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let mut map = IndexMap::with_capacity(c);
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let keys = shuffled_keys(0..c);
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for &key in &keys {
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map.insert(key, 1);
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}
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b.iter(|| {
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let mut found = 0;
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for key in 5000..c {
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found += map.get(&key).is_some() as i32;
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}
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found
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});
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}
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#[bench]
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fn lookup_indexmap_10_000_noexist(b: &mut Bencher) {
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let c = 10_000;
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let mut map = IndexMap::with_capacity(c);
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let keys = shuffled_keys(0..c);
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for &key in &keys {
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map.insert(key, 1);
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}
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b.iter(|| {
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let mut found = 0;
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for key in c..15000 {
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found += map.get(&key).is_some() as i32;
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}
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found
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});
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}
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// number of items to look up
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const LOOKUP_MAP_SIZE: u32 = 100_000_u32;
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const LOOKUP_SAMPLE_SIZE: u32 = 5000;
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const SORT_MAP_SIZE: usize = 10_000;
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// use lazy_static so that comparison benchmarks use the exact same inputs
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lazy_static! {
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static ref KEYS: Vec<u32> = shuffled_keys(0..LOOKUP_MAP_SIZE);
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}
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lazy_static! {
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static ref HMAP_100K: HashMap<u32, u32> = {
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let c = LOOKUP_MAP_SIZE;
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let mut map = HashMap::with_capacity(c as usize);
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let keys = &*KEYS;
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for &key in keys {
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map.insert(key, key);
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}
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map
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};
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}
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lazy_static! {
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static ref IMAP_100K: IndexMap<u32, u32> = {
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let c = LOOKUP_MAP_SIZE;
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let mut map = IndexMap::with_capacity(c as usize);
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let keys = &*KEYS;
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for &key in keys {
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map.insert(key, key);
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}
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map
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};
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}
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lazy_static! {
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static ref IMAP_SORT_U32: IndexMap<u32, u32> = {
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let mut map = IndexMap::with_capacity(SORT_MAP_SIZE);
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for &key in &KEYS[..SORT_MAP_SIZE] {
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map.insert(key, key);
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}
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map
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};
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}
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lazy_static! {
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static ref IMAP_SORT_S: IndexMap<String, String> = {
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let mut map = IndexMap::with_capacity(SORT_MAP_SIZE);
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for &key in &KEYS[..SORT_MAP_SIZE] {
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map.insert(format!("{:^16x}", &key), String::new());
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}
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map
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};
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}
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#[bench]
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fn lookup_hashmap_100_000_multi(b: &mut Bencher) {
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let map = &*HMAP_100K;
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b.iter(|| {
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let mut found = 0;
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for key in 0..LOOKUP_SAMPLE_SIZE {
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found += map.get(&key).is_some() as u32;
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}
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found
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});
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}
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#[bench]
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fn lookup_indexmap_100_000_multi(b: &mut Bencher) {
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let map = &*IMAP_100K;
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b.iter(|| {
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let mut found = 0;
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for key in 0..LOOKUP_SAMPLE_SIZE {
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found += map.get(&key).is_some() as u32;
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}
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found
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});
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}
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// inorder: Test looking up keys in the same order as they were inserted
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#[bench]
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fn lookup_hashmap_100_000_inorder_multi(b: &mut Bencher) {
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let map = &*HMAP_100K;
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let keys = &*KEYS;
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b.iter(|| {
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let mut found = 0;
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for key in &keys[0..LOOKUP_SAMPLE_SIZE as usize] {
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found += map.get(key).is_some() as u32;
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}
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found
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});
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}
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#[bench]
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fn lookup_indexmap_100_000_inorder_multi(b: &mut Bencher) {
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let map = &*IMAP_100K;
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let keys = &*KEYS;
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b.iter(|| {
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let mut found = 0;
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for key in &keys[0..LOOKUP_SAMPLE_SIZE as usize] {
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found += map.get(key).is_some() as u32;
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}
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found
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});
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}
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#[bench]
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fn lookup_hashmap_100_000_single(b: &mut Bencher) {
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let map = &*HMAP_100K;
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let mut iter = (0..LOOKUP_MAP_SIZE + LOOKUP_SAMPLE_SIZE).cycle();
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b.iter(|| {
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let key = iter.next().unwrap();
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map.get(&key).is_some()
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});
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}
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#[bench]
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fn lookup_indexmap_100_000_single(b: &mut Bencher) {
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let map = &*IMAP_100K;
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let mut iter = (0..LOOKUP_MAP_SIZE + LOOKUP_SAMPLE_SIZE).cycle();
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b.iter(|| {
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let key = iter.next().unwrap();
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map.get(&key).is_some()
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});
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}
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const GROW_SIZE: usize = 100_000;
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type GrowKey = u32;
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// Test grow/resize without preallocation
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#[bench]
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fn grow_fnv_hashmap_100_000(b: &mut Bencher) {
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b.iter(|| {
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let mut map: HashMap<_, _, FnvBuilder> = HashMap::default();
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for x in 0..GROW_SIZE {
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map.insert(x as GrowKey, x as GrowKey);
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}
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map
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});
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}
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#[bench]
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fn grow_fnv_indexmap_100_000(b: &mut Bencher) {
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b.iter(|| {
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let mut map: IndexMap<_, _, FnvBuilder> = IndexMap::default();
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for x in 0..GROW_SIZE {
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map.insert(x as GrowKey, x as GrowKey);
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}
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map
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});
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}
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const MERGE: u64 = 10_000;
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#[bench]
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fn hashmap_merge_simple(b: &mut Bencher) {
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let first_map: HashMap<u64, _> = (0..MERGE).map(|i| (i, ())).collect();
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let second_map: HashMap<u64, _> = (MERGE..MERGE * 2).map(|i| (i, ())).collect();
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b.iter(|| {
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let mut merged = first_map.clone();
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merged.extend(second_map.iter().map(|(&k, &v)| (k, v)));
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merged
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});
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}
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#[bench]
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fn hashmap_merge_shuffle(b: &mut Bencher) {
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let first_map: HashMap<u64, _> = (0..MERGE).map(|i| (i, ())).collect();
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let second_map: HashMap<u64, _> = (MERGE..MERGE * 2).map(|i| (i, ())).collect();
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let mut v = Vec::new();
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let mut rng = small_rng();
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b.iter(|| {
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let mut merged = first_map.clone();
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v.extend(second_map.iter().map(|(&k, &v)| (k, v)));
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v.shuffle(&mut rng);
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merged.extend(v.drain(..));
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merged
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});
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}
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#[bench]
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fn indexmap_merge_simple(b: &mut Bencher) {
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let first_map: IndexMap<u64, _> = (0..MERGE).map(|i| (i, ())).collect();
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let second_map: IndexMap<u64, _> = (MERGE..MERGE * 2).map(|i| (i, ())).collect();
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b.iter(|| {
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let mut merged = first_map.clone();
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merged.extend(second_map.iter().map(|(&k, &v)| (k, v)));
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merged
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});
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}
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#[bench]
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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());
|
|
}
|