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Code Issues Releases Wiki Activity

add cache in typo criterion

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many 2021-02-18 14:40:59 +01:00 committed by Kerollmops
parent 67c71130df
commit 4da6e1ea9c
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GPG Key ID: 92ADA4E935E71FA4
1 changed files with 31 additions and 9 deletions
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40
milli/src/search/criteria/typo.rs
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@ -1,4 +1,4 @@
use std::{borrow::Cow, mem::take};
use std::{borrow::Cow, collections::HashMap, mem::take};
use anyhow::bail;
use roaring::RoaringBitmap;
@ -18,6 +18,7 @@ pub struct Typo<'t> {
candidates: Candidates,
bucket_candidates: Option<RoaringBitmap>,
parent: Option<Box<dyn Criterion>>,
cache: HashMap<(Operation, u8), RoaringBitmap>,
}
impl<'t> Typo<'t> {
@ -34,6 +35,7 @@ impl<'t> Typo<'t> {
candidates: candidates.map_or_else(Candidates::default, Candidates::Allowed),
bucket_candidates: None,
parent: None,
cache: HashMap::new(),
})
}
@ -49,6 +51,7 @@ impl<'t> Typo<'t> {
candidates: Candidates::default(),
bucket_candidates: None,
parent: Some(parent),
cache: HashMap::new(),
})
}
}
@ -73,7 +76,7 @@ impl<'t> Criterion for Typo<'t> {
query_tree.clone()
};
let mut new_candidates = resolve_candidates(self.ctx, &new_query_tree, self.number_typos)?;
let mut new_candidates = resolve_candidates(self.ctx, &new_query_tree, self.number_typos, &mut self.cache)?;
new_candidates.intersect_with(&candidates);
candidates.difference_with(&new_candidates);
self.number_typos += 1;
@ -100,7 +103,7 @@ impl<'t> Criterion for Typo<'t> {
query_tree.clone()
};
let mut new_candidates = resolve_candidates(self.ctx, &new_query_tree, self.number_typos)?;
let mut new_candidates = resolve_candidates(self.ctx, &new_query_tree, self.number_typos, &mut self.cache)?;
new_candidates.difference_with(&candidates);
candidates.union_with(&new_candidates);
self.number_typos += 1;
@ -196,6 +199,7 @@ fn resolve_candidates<'t>(
ctx: &'t dyn Context,
query_tree: &Operation,
number_typos: u8,
cache: &mut HashMap<(Operation, u8), RoaringBitmap>,
) -> anyhow::Result<RoaringBitmap>
{
// FIXME add a cache
@ -206,13 +210,14 @@ fn resolve_candidates<'t>(
ctx: &'t dyn Context,
query_tree: &Operation,
number_typos: u8,
cache: &mut HashMap<(Operation, u8), RoaringBitmap>,
) -> anyhow::Result<RoaringBitmap>
{
use Operation::{And, Consecutive, Or, Query};
match query_tree {
And(ops) => {
mdfs(ctx, ops, number_typos)
mdfs(ctx, ops, number_typos, cache)
},
Consecutive(ops) => {
let mut candidates = RoaringBitmap::new();
@ -241,7 +246,7 @@ fn resolve_candidates<'t>(
Or(_, ops) => {
let mut candidates = RoaringBitmap::new();
for op in ops {
let docids = resolve_operation(ctx, op, number_typos)?;
let docids = resolve_operation(ctx, op, number_typos, cache)?;
candidates.union_with(&docids);
}
Ok(candidates)
@ -259,17 +264,34 @@ fn resolve_candidates<'t>(
ctx: &'t dyn Context,
branches: &[Operation],
mana: u8,
cache: &mut HashMap<(Operation, u8), RoaringBitmap>,
) -> anyhow::Result<RoaringBitmap>
{
match branches.split_first() {
Some((head, [])) => resolve_operation(ctx, head, mana),
Some((head, [])) => {
if let Some(candidates) = cache.get(&(head.clone(), mana)) {
Ok(candidates.clone())
} else {
let candidates = resolve_operation(ctx, head, mana, cache)?;
cache.insert((head.clone(), mana), candidates.clone());
Ok(candidates)
}
},
Some((head, tail)) => {
let mut candidates = RoaringBitmap::new();
for m in 0..=mana {
let mut head_candidates = resolve_operation(ctx, head, m)?;
let mut head_candidates = {
if let Some(candidates) = cache.get(&(head.clone(), m)) {
candidates.clone()
} else {
let candidates = resolve_operation(ctx, head, m, cache)?;
cache.insert((head.clone(), m), candidates.clone());
candidates
}
};
if !head_candidates.is_empty() {
let tail_candidates = mdfs(ctx, tail, mana - m)?;
let tail_candidates = mdfs(ctx, tail, mana - m, cache)?;
head_candidates.intersect_with(&tail_candidates);
candidates.union_with(&head_candidates);
}
@ -281,5 +303,5 @@ fn resolve_candidates<'t>(
}
}
resolve_operation(ctx, query_tree, number_typos)
resolve_operation(ctx, query_tree, number_typos, cache)
}