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Avoid iterating on big databases when useless

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Kerollmops
2022-03-01 18:02:12 +01:00
parent a8d28e364d
commit 1ae13c1374
3 changed files with 111 additions and 98 deletions
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47
milli/src/update/word_prefix_docids.rs
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@ -50,35 +50,38 @@ impl<'t, 'u, 'i> WordPrefixDocids<'t, 'u, 'i> {
self.max_memory,
);
let mut new_word_docids_iter = new_word_docids.into_cursor()?;
let mut current_prefixes: Option<&&[String]> = None;
let mut prefixes_cache = HashMap::new();
while let Some((word, data)) = new_word_docids_iter.move_on_next()? {
current_prefixes = match current_prefixes.take() {
Some(prefixes) if word.starts_with(&prefixes[0].as_bytes()) => Some(prefixes),
_otherwise => {
write_prefixes_in_sorter(&mut prefixes_cache, &mut prefix_docids_sorter)?;
common_prefix_fst_words
.iter()
.find(|prefixes| word.starts_with(&prefixes[0].as_bytes()))
}
};
if !common_prefix_fst_words.is_empty() {
let mut new_word_docids_iter = new_word_docids.into_cursor()?;
let mut current_prefixes: Option<&&[String]> = None;
let mut prefixes_cache = HashMap::new();
while let Some((word, data)) = new_word_docids_iter.move_on_next()? {
current_prefixes = match current_prefixes.take() {
Some(prefixes) if word.starts_with(&prefixes[0].as_bytes()) => Some(prefixes),
_otherwise => {
write_prefixes_in_sorter(&mut prefixes_cache, &mut prefix_docids_sorter)?;
common_prefix_fst_words
.iter()
.find(|prefixes| word.starts_with(&prefixes[0].as_bytes()))
}
};
if let Some(prefixes) = current_prefixes {
for prefix in prefixes.iter() {
if word.starts_with(prefix.as_bytes()) {
match prefixes_cache.get_mut(prefix.as_bytes()) {
Some(value) => value.push(data.to_owned()),
None => {
prefixes_cache.insert(prefix.clone().into(), vec![data.to_owned()]);
if let Some(prefixes) = current_prefixes {
for prefix in prefixes.iter() {
if word.starts_with(prefix.as_bytes()) {
match prefixes_cache.get_mut(prefix.as_bytes()) {
Some(value) => value.push(data.to_owned()),
None => {
prefixes_cache
.insert(prefix.clone().into(), vec![data.to_owned()]);
}
}
}
}
}
}
}
write_prefixes_in_sorter(&mut prefixes_cache, &mut prefix_docids_sorter)?;
write_prefixes_in_sorter(&mut prefixes_cache, &mut prefix_docids_sorter)?;
}
// We fetch the docids associated to the newly added word prefix fst only.
let db = self.index.word_docids.remap_data_type::<ByteSlice>();