Refactor CandidateMap
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7234E476BF21C61A
@ -1,7 +1,7 @@
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#!/bin/bash
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cargo build --release || exit
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perf stat -r 5 -o benchmark.log ./target/release/opentally stv '/home/runassudo/git/stvdb/Australian Senate/2022/VIC.blt' --round-votes 0 --round-quota 0 --quota droop --quota-criterion geq --ties backwards random --random-seed 20210727 --surplus uig --surplus-order by_order --exclusion by_value --pp-decimals 0 $@
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perf stat -r 5 --table -o benchmark.log ./target/release/opentally stv '/home/runassudo/git/stvdb/Australian Senate/2022/VIC.blt' --round-votes 0 --round-quota 0 --quota droop --quota-criterion geq --ties backwards random --random-seed 20210727 --surplus uig --surplus-order by_order --exclusion by_value --pp-decimals 0 $@
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cat benchmark.log
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git describe --always --dirty=-dev | tee -a benchmark.log
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@ -19,67 +19,62 @@ use crate::election::Candidate;
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use std::ops::Index;
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/// Newtype for [HashMap] on [Candidate]s
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/// Mimics a [HashMap] on [Candidate]s, but internally is a [Vec] based on [Candidate::index]
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#[derive(Clone)]
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pub struct CandidateMap<'e, V> {
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keys: Vec<Option<&'e Candidate>>,
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values: Vec<Option<V>>
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entries: Vec<Option<(&'e Candidate, V)>>
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}
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impl<'e, V> CandidateMap<'e, V> {
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/// See [HashMap::new]
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pub fn new() -> Self {
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Self {
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keys: Vec::new(),
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values: Vec::new()
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entries: Vec::new()
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}
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}
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/// See [HashMap::with_capacity]
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pub fn with_capacity(capacity: usize) -> Self {
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let mut ret = Self {
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keys: Vec::with_capacity(capacity),
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values: Vec::with_capacity(capacity)
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entries: Vec::with_capacity(capacity)
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};
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ret.maybe_resize(capacity);
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return ret;
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}
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fn maybe_resize(&mut self, len: usize) {
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if len < self.keys.len() {
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if len < self.entries.len() {
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return;
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}
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self.keys.resize_with(len, || None);
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self.values.resize_with(len, || None);
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self.entries.resize_with(len, || None);
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}
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/// See [HashMap::len]
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#[inline]
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pub fn len(&self) -> usize {
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return self.keys.iter().filter(|k| k.is_some()).count();
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return self.entries.iter().filter(|e| e.is_some()).count();
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}
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/// See [HashMap::insert]
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#[inline]
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pub fn insert(&mut self, candidate: &'e Candidate, value: V) {
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self.maybe_resize(candidate.index + 1);
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self.keys[candidate.index] = Some(candidate);
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self.values[candidate.index] = Some(value);
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self.entries[candidate.index] = Some((candidate, value));
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}
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/// See [HashMap::get]
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#[inline]
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pub fn get(&self, candidate: &'e Candidate) -> Option<&V> {
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return self.values.get(candidate.index).unwrap_or(&None).as_ref();
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return self.entries.get(candidate.index).unwrap_or(&None).as_ref().map(|(_, v)| v);
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}
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/// See [HashMap::get_mut]
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#[inline]
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pub fn get_mut(&mut self, candidate: &'e Candidate) -> Option<&mut V> {
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match self.values.get_mut(candidate.index) {
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match self.entries.get_mut(candidate.index) {
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Some(v) => {
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return v.as_mut();
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return v.as_mut().map(|(_, v)| v);
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}
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None => {
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return None;
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@ -110,10 +105,11 @@ impl<'e, V> Index<&Candidate> for CandidateMap<'e, V> {
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type Output = V;
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fn index(&self, candidate: &Candidate) -> &Self::Output {
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return self.values.get(candidate.index).unwrap_or(&None).as_ref().unwrap();
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return self.entries.get(candidate.index).unwrap_or(&None).as_ref().map(|(_, v)| v).unwrap();
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}
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}
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/// See [CandidateMap::iter]
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pub struct Iter<'m, 'e, V> {
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map: &'m CandidateMap<'e, V>,
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index: usize
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@ -124,17 +120,14 @@ impl<'m, 'e, V> Iterator for Iter<'m, 'e, V> {
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fn next(&mut self) -> Option<Self::Item> {
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loop {
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match self.map.keys.get(self.index) {
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Some(k) => {
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match self.map.entries.get(self.index) {
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Some(e) => {
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// Key within range
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match k {
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Some(kk) => {
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match e {
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Some((k, v)) => {
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// Key is set
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// SAFETY: Guaranteed to be set, as we update key and value at the same time
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let v = unsafe { self.map.values.get_unchecked(self.index).as_ref().unwrap_unchecked() };
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self.index += 1;
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return Some((kk, v));
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return Some((k, v));
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}
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None => {
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// Key is unset
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@ -152,6 +145,7 @@ impl<'m, 'e, V> Iterator for Iter<'m, 'e, V> {
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}
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}
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/// See [CandidateMap::iter_mut]
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pub struct IterMut<'m, 'e, V> {
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map: &'m mut CandidateMap<'e, V>,
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index: usize
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@ -162,22 +156,19 @@ impl<'m, 'e, V> Iterator for IterMut<'m, 'e, V> {
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fn next(&mut self) -> Option<Self::Item> {
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loop {
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match self.map.keys.get(self.index) {
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Some(k) => {
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match self.map.entries.get_mut(self.index) {
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Some(e) => {
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// Key within range
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match k {
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Some(kk) => {
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match e {
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Some((k, v)) => {
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// Key is set
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// SAFETY: Guaranteed to be set, as we update key and value at the same time
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let v = unsafe { self.map.values.get_unchecked_mut(self.index).as_mut().unwrap_unchecked() };
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let v_ptr = v as *mut V;
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// SAFETY: Need unsafe pointer magic for IterMut
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let vv = unsafe { &mut *v_ptr };
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self.index += 1;
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return Some((kk, vv));
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return Some((k, vv));
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}
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None => {
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// Key is unset
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@ -195,6 +186,7 @@ impl<'m, 'e, V> Iterator for IterMut<'m, 'e, V> {
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}
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}
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/// See [CandidateMap::values]
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pub struct Values<'m, 'e, V> {
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map: &'m CandidateMap<'e, V>,
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index: usize
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@ -205,14 +197,14 @@ impl<'m, 'e, V> Iterator for Values<'m, 'e, V> {
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fn next(&mut self) -> Option<Self::Item> {
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loop {
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match self.map.values.get(self.index) {
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Some(v) => {
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match self.map.entries.get(self.index) {
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Some(e) => {
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// Key within range
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match v {
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Some(vv) => {
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match e {
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Some((_, v)) => {
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// Key is set
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self.index += 1;
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return Some(vv);
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return Some(v);
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}
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None => {
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// Key is unset
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@ -230,6 +222,7 @@ impl<'m, 'e, V> Iterator for Values<'m, 'e, V> {
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}
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}
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/// See [CandidateMap::into_iter]
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pub struct IntoIter<'e, V> {
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map: CandidateMap<'e, V>,
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index: usize
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@ -240,17 +233,14 @@ impl<'e, V> Iterator for IntoIter<'e, V> {
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fn next(&mut self) -> Option<Self::Item> {
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loop {
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match self.map.keys.get(self.index) {
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Some(k) => {
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match self.map.entries.get_mut(self.index) {
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Some(e) => {
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// Key within range
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match k {
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Some(kk) => {
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match e.take() {
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Some((k, v)) => {
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// Key is set
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// SAFETY: Guaranteed to be set, as we update key and value at the same time
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let v = unsafe { self.map.values.get_unchecked_mut(self.index).take().unwrap_unchecked() };
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self.index += 1;
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return Some((kk, v));
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return Some((k, v));
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}
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None => {
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// Key is unset
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