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Code Issues Releases Wiki Activity

Fix the ARC cache

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This commit is contained in:
Kerollmops 2020-07-01 10:35:07 +02:00
parent 2fcae719ad
commit fc4013a43f
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GPG Key ID: 92ADA4E935E71FA4
2 changed files with 10 additions and 39 deletions
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7
src/bin/indexer.rs
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@ -2,6 +2,7 @@ use std::collections::hash_map::Entry;
use std::collections::{HashMap, BTreeSet};
use std::convert::{TryFrom, TryInto};
use std::io;
use std::ops::BitOr;
use std::path::PathBuf;
use std::sync::atomic::{AtomicUsize, Ordering};
@ -74,7 +75,7 @@ fn index_csv<R: io::Read>(wtxn: &mut heed::RwTxn, mut rdr: csv::Reader<R>, index
None => {
let mut ids = index.word_positions.get(wtxn, &word)?.unwrap_or_default();
ids.insert(position);
for (word, ids) in word_positions.insert(word.clone(), ids) {
for (word, ids) in word_positions.insert(word.clone(), ids, RoaringBitmap::bitor) {
index.word_positions.put(wtxn, &word, &ids)?;
}
}
@ -90,7 +91,7 @@ fn index_csv<R: io::Read>(wtxn: &mut heed::RwTxn, mut rdr: csv::Reader<R>, index
None => {
let mut ids = index.word_position_docids.get(wtxn, &key)?.unwrap_or_default();
ids.insert(position);
for ((word, position), ids) in word_position_docids.insert((word.clone(), position), ids) {
for ((word, position), ids) in word_position_docids.insert((word.clone(), position), ids, RoaringBitmap::bitor) {
let mut key = word.as_bytes().to_vec();
key.extend_from_slice(&position.to_be_bytes());
index.word_position_docids.put(wtxn, &key, &ids)?;
@ -123,7 +124,7 @@ fn index_csv<R: io::Read>(wtxn: &mut heed::RwTxn, mut rdr: csv::Reader<R>, index
let iter = index.word_positions.as_polymorph().iter::<_, Str, DecodeIgnore>(wtxn)?;
for result in iter {
let (word, ()) = result?;
new_words.insert(word.clone());
new_words.insert(word);
}
let new_words_fst = fst::Set::from_iter(new_words)?;

42
src/cache.rs
View File

@ -34,25 +34,6 @@ impl<K: PartialEq> PartialEq for KeyRef<K> {
impl<K: Eq> Eq for KeyRef<K> {}
#[cfg(feature = "nightly")]
#[doc(hidden)]
pub auto trait NotKeyRef {}
#[cfg(feature = "nightly")]
impl<K> !NotKeyRef for KeyRef<K> {}
#[cfg(feature = "nightly")]
impl<K, D> Borrow<D> for KeyRef<K>
where
K: Borrow<D>,
D: NotKeyRef + ?Sized,
{
fn borrow(&self) -> &D {
unsafe { &*self.k }.borrow()
}
}
#[cfg(not(feature = "nightly"))]
impl<K> Borrow<K> for KeyRef<K> {
fn borrow(&self) -> &K {
unsafe { &*self.k }
@ -88,7 +69,7 @@ impl<K, V> LruEntry<K, V> {
}
}
/// An LRU Cache
/// An LRU Cache.
pub struct LruCache<K, V> {
map: FastMap8<KeyRef<K>, Box<LruEntry<K, V>>>,
cap: usize,
@ -100,13 +81,6 @@ pub struct LruCache<K, V> {
impl<K: Hash + Eq, V> LruCache<K, V> {
/// Creates a new LRU Cache that holds at most `cap` items.
///
/// # Example
///
/// ```
/// use lru::LruCache;
/// let mut cache: LruCache<isize, &str> = LruCache::new(10);
/// ```
pub fn new(cap: usize) -> LruCache<K, V> {
let mut map = FastMap8::default();
map.reserve(cap);
@ -114,13 +88,6 @@ impl<K: Hash + Eq, V> LruCache<K, V> {
}
/// Creates a new LRU Cache that never automatically evicts items.
///
/// # Example
///
/// ```
/// use lru::LruCache;
/// let mut cache: LruCache<isize, &str> = LruCache::unbounded();
/// ```
pub fn unbounded() -> LruCache<K, V> {
LruCache::construct(usize::MAX, HashMap::default())
}
@ -443,13 +410,16 @@ where
}
}
pub fn insert(&mut self, key: K, value: V) -> Vec<(K, V)> {
pub fn insert<F>(&mut self, key: K, value: V, mut merge: F) -> Vec<(K, V)>
where F: FnMut(V, V) -> V
{
let mut evicted = Vec::new();
if self.frequent_set.contains_key(&key) {
evicted.extend(self.frequent_set.insert(key, value));
return evicted;
}
if self.recent_set.remove(&key).is_some() {
if let Some(prev_value) = self.recent_set.remove(&key) {
let value = (merge)(prev_value, value);
evicted.extend(self.frequent_set.insert(key, value));
return evicted;
}