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Fix typos
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@ -4,7 +4,7 @@
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Nucleo uses the exact **same scoring system as fzf**. That means you should get the same ranking quality (or better) as you are used to from fzf. However, `nucleo` has a more faithful implementation of the Smith-Waterman algorithm which is normally used in DNA sequence alignment (see https://www.cs.cmu.edu/~ckingsf/bioinfo-lectures/gaps.pdf) with two separate matrices (instead of one like fzf). This means that `nucleo` finds the optimal match more often. For example if you match `foo` in `xf foo` `nucleo` will match `x__foo` but `fzf` will match `xf_oo` (you can increase the word length the result will stay the same). The former is the more intuitive match and has a higher score according to the ranking system that both `nucleo` and fzf.
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Nucleo uses the exact **same scoring system as fzf**. That means you should get the same ranking quality (or better) as you are used to from fzf. However, `nucleo` has a more faithful implementation of the Smith-Waterman algorithm which is normally used in DNA sequence alignment (see https://www.cs.cmu.edu/~ckingsf/bioinfo-lectures/gaps.pdf) with two separate matrices (instead of one like fzf). This means that `nucleo` finds the optimal match more often. For example if you match `foo` in `xf foo` `nucleo` will match `x__foo` but `fzf` will match `xf_oo` (you can increase the word length the result will stay the same). The former is the more intuitive match and has a higher score according to the ranking system that both `nucleo` and fzf.
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**Compared to `skim`** (and the `fuzzy-matcher` crate) `nucleo` has an even larger performance advantage and is often around **six times faster** (see benchmarks below). Furthermore, the bonus system used by nucleo and fzf is (in my opinion)more consistent/superior. `nulceo` also handles non-ascii text much better. (`skim`s bonus system and even case insensitivity only work for ASCII).
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**Compared to `skim`** (and the `fuzzy-matcher` crate) `nucleo` has an even larger performance advantage and is often around **six times faster** (see benchmarks below). Furthermore, the bonus system used by nucleo and fzf is (in my opinion) more consistent/superior. `nulceo` also handles non-ascii text much better. (`skim`s bonus system and even case insensitivity only work for ASCII).
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Nucleo also handles Unicode graphemes more correctly. `Fzf` and `skim` both operate on Unicode code points (chars). That means that multi codepoint graphemes can have weird effects (match multiple times, weirdly change the score, ...). `nucleo` will always use the first codepoint of the grapheme for matching instead (and reports grapheme indices, so they can be highlighted correctly).
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Nucleo also handles Unicode graphemes more correctly. `Fzf` and `skim` both operate on Unicode code points (chars). That means that multi codepoint graphemes can have weird effects (match multiple times, weirdly change the score, ...). `nucleo` will always use the first codepoint of the grapheme for matching instead (and reports grapheme indices, so they can be highlighted correctly).
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@ -156,7 +156,7 @@ pub enum CharClass {
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Number,
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Number,
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}
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}
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/// nucleo can not match graphemes as single units to work around
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/// nucleo cannot match graphemes as single units to work around
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/// that we only use the first codepoint of each grapheme
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/// that we only use the first codepoint of each grapheme
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pub fn graphemes(text: &str) -> impl Iterator<Item = char> + '_ {
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pub fn graphemes(text: &str) -> impl Iterator<Item = char> + '_ {
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text.graphemes(true).map(|grapheme| {
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text.graphemes(true).map(|grapheme| {
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@ -145,7 +145,7 @@ impl Matcher {
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}
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}
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}
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}
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// in case we don't have any letter in the needle
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// in case we don't have any letter in the needle
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// we can treat the search as case sensitive and use memmem dircedly which is way faster
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// we can treat the search as case sensitive and use memmem directly which is way faster
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None => (),
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None => (),
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}
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}
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}
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}
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@ -36,7 +36,7 @@ use crate::matrix::MatrixSlab;
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/// A matcher engine that can execute (fuzzy) matches.
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/// A matcher engine that can execute (fuzzy) matches.
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///
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///
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/// A matches contains **heap allocated** scratch memory that is reused during
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/// A matches contains **heap allocated** scratch memory that is reused during
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/// matching. This scratch memory allows the matcher to garunte that it will
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/// matching. This scratch memory allows the matcher to guarantee that it will
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/// **never allocate** during matching (with the exception of pushing to the
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/// **never allocate** during matching (with the exception of pushing to the
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/// `indices` vector if there isn't enough capacity). However this scratch
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/// `indices` vector if there isn't enough capacity). However this scratch
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/// memory is fairly large (around 135KB) so creating a matcher is expensive and
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/// memory is fairly large (around 135KB) so creating a matcher is expensive and
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@ -58,7 +58,7 @@ pub struct Matcher {
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slab: MatrixSlab,
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slab: MatrixSlab,
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}
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}
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// this is just here for convenience not ruse if we should implement this
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// this is just here for convenience not sure if we should implement this
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impl Clone for Matcher {
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impl Clone for Matcher {
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fn clone(&self) -> Self {
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fn clone(&self) -> Self {
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Matcher {
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Matcher {
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@ -93,7 +93,7 @@ impl Matcher {
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}
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}
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}
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}
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/// Find the fuzzy match with the higehest score in the `haystack`.
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/// Find the fuzzy match with the highest score in the `haystack`.
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///
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///
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/// This functions has `O(mn)` time complexity for short inputs. To
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/// This functions has `O(mn)` time complexity for short inputs. To
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/// avoid slowdowns it automatically falls back to [greedy matching]
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/// avoid slowdowns it automatically falls back to [greedy matching]
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@ -241,7 +241,7 @@ impl Matcher {
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/// Greedly find a fuzzy match in the `haystack` and compute its indices.
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/// Greedly find a fuzzy match in the `haystack` and compute its indices.
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///
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///
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/// This functions has `O(n)` time complexity but may provide unintutive (non-optimal)
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/// This functions has `O(n)` time complexity but may provide unintuitive (non-optimal)
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/// indices and scores. Usually [fuzz_indices](crate::Matcher::fuzzy_indices) should
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/// indices and scores. Usually [fuzz_indices](crate::Matcher::fuzzy_indices) should
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/// be preferred.
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/// be preferred.
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///
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///
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@ -107,7 +107,7 @@ pub(crate) struct ScoreCell {
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pub(crate) struct MatcherDataView<'a, C: Char> {
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pub(crate) struct MatcherDataView<'a, C: Char> {
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pub haystack: &'a mut [C],
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pub haystack: &'a mut [C],
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// stored as a separate array instead of struct
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// stored as a separate array instead of struct
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// to avoid padding sine char is too large and u8 too small :/
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// to avoid padding since char is too large and u8 too small :/
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pub bonus: &'a mut [u8],
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pub bonus: &'a mut [u8],
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pub current_row: &'a mut [ScoreCell],
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pub current_row: &'a mut [ScoreCell],
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pub row_offs: &'a mut [u16],
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pub row_offs: &'a mut [u16],
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@ -162,7 +162,7 @@ impl MatrixSlab {
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let cells = haystack_.len() * needle_len;
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let cells = haystack_.len() * needle_len;
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if cells > MAX_MATRIX_SIZE
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if cells > MAX_MATRIX_SIZE
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|| haystack_.len() > u16::MAX as usize
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|| haystack_.len() > u16::MAX as usize
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// ensures that socres never overflow
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// ensures that scores never overflow
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|| needle_len > MAX_NEEDLE_LEN
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|| needle_len > MAX_NEEDLE_LEN
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{
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{
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return None;
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return None;
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@ -175,7 +175,7 @@ impl MatrixSlab {
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// safely: this allocation is valid for MATRIX_ALLOC_LAYOUT
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// safely: this allocation is valid for MATRIX_ALLOC_LAYOUT
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let (haystack, bonus, rows, current_row, matrix_cells) =
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let (haystack, bonus, rows, current_row, matrix_cells) =
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matrix_layout.fieds_from_ptr(self.0);
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matrix_layout.fieds_from_ptr(self.0);
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// copy haystack before creating references to ensure we donu't crate
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// copy haystack before creating references to ensure we don't create
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// references to invalid chars (which may or may not be UB)
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// references to invalid chars (which may or may not be UB)
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haystack_
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haystack_
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.as_ptr()
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.as_ptr()
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@ -20,7 +20,7 @@ pub(crate) const BONUS_BOUNDARY: u16 = SCORE_MATCH / 2;
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// However, this priporitzes camel case over non-camel case.
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// However, this priporitzes camel case over non-camel case.
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// In fzf/skim this is not a problem since they score off the max
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// In fzf/skim this is not a problem since they score off the max
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// consecutive bonus. However, we don't do that (because its incorrect)
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// consecutive bonus. However, we don't do that (because its incorrect)
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// so to avoids prioritzing camel we use a lower bonus. I think that's fine
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// so to avoids prioritizing camel we use a lower bonus. I think that's fine
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// usually camel case is wekaer boundary than actual wourd boundaries anyway
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// usually camel case is wekaer boundary than actual wourd boundaries anyway
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// This also has the nice sideeffect of perfectly balancing out
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// This also has the nice sideeffect of perfectly balancing out
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// camel case, snake case and the consecutive version of the word
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// camel case, snake case and the consecutive version of the word
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@ -97,7 +97,7 @@ impl Matcher {
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let mut in_gap = false;
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let mut in_gap = false;
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let mut consecutive = 1;
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let mut consecutive = 1;
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// unrolled the firs iteration to make applying the first char multiplier less akward
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// unrolled the first iteration to make applying the first char multiplier less awkward
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if INDICES {
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if INDICES {
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indices.push(start as u32)
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indices.push(start as u32)
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}
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}
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@ -5,7 +5,7 @@ use std::{fmt, slice};
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///
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///
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/// Usually rusts' utf8 encoded strings are great. However during fuzzy matching
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/// Usually rusts' utf8 encoded strings are great. However during fuzzy matching
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/// operates on codepoints (it should operate on graphemes but that's too much
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/// operates on codepoints (it should operate on graphemes but that's too much
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/// hassle to deal with). We want to quickly iterate these codeboints between
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/// hassle to deal with). We want to quickly iterate these codepoints between
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/// (up to 5 times) during matching.
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/// (up to 5 times) during matching.
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///
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///
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/// Doing codepoint segmentation on the fly not only blows trough the cache
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/// Doing codepoint segmentation on the fly not only blows trough the cache
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@ -14,7 +14,7 @@ use std::{fmt, slice};
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/// for ascii only text (but checking during each match has too much overhead).
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/// for ascii only text (but checking during each match has too much overhead).
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///
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///
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/// Ofcourse this comes at exta memory cost as we usually still need the ut8
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/// Ofcourse this comes at exta memory cost as we usually still need the ut8
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/// encoded variant for rendenring. In the (dominant) case of ascii-only text
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/// encoded variant for rendering. In the (dominant) case of ascii-only text
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/// we don't require a copy. Furthermore fuzzy matching usually is applied while
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/// we don't require a copy. Furthermore fuzzy matching usually is applied while
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/// the user is typing on the fly so the same item is potentially matched many
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/// the user is typing on the fly so the same item is potentially matched many
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/// times (making the the upfront cost more worth it). That means that its
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/// times (making the the upfront cost more worth it). That means that its
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@ -24,8 +24,8 @@ use std::{fmt, slice};
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/// char buffer around that is filled with the presegmented chars
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/// char buffer around that is filled with the presegmented chars
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///
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///
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/// Another advantage of this approach is that the matcher will naturally
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/// Another advantage of this approach is that the matcher will naturally
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/// produce char indices (instead of utf8 offsets) annyway. With a
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/// produce char indices (instead of utf8 offsets) anyway. With a
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/// codepoint basec representation like this the indices can be used
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/// codepoint basic representation like this the indices can be used
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/// directly
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/// directly
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#[derive(PartialEq, Eq, PartialOrd, Ord, Clone, Copy, Hash)]
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#[derive(PartialEq, Eq, PartialOrd, Ord, Clone, Copy, Hash)]
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pub enum Utf32Str<'a> {
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pub enum Utf32Str<'a> {
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@ -84,7 +84,7 @@ impl<'a> Utf32Str<'a> {
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}
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}
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}
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}
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/// Same as `slice` but accepts a u32 range for convenicene sine
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/// Same as `slice` but accepts a u32 range for convenience since
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/// those are the indices returned by the matcher
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/// those are the indices returned by the matcher
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#[inline]
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#[inline]
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pub fn slice_u32(&self, range: impl RangeBounds<u32>) -> Utf32Str {
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pub fn slice_u32(&self, range: impl RangeBounds<u32>) -> Utf32Str {
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@ -43,9 +43,9 @@ pub(crate) struct Vec<T> {
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buckets: [Bucket<T>; BUCKETS as usize],
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buckets: [Bucket<T>; BUCKETS as usize],
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/// the number of initialized elements in this vector
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/// the number of initialized elements in this vector
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count: AtomicU32,
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count: AtomicU32,
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/// the number of matcher columns in this vector, its absoletly critical that
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/// the number of matcher columns in this vector, its absolutely critical that
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/// this remains constant and after initilaziaton (safety invariant) since
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/// this remains constant and after initilaziaton (safety invariant) since
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/// it is used to calculate the Entry layou
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/// it is used to calculate the Entry layout
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columns: u32,
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columns: u32,
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}
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}
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14
src/lib.rs
14
src/lib.rs
@ -8,7 +8,7 @@ use rayon::ThreadPool;
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pub use crate::pattern::{CaseMatching, MultiPattern, Pattern, PatternKind};
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pub use crate::pattern::{CaseMatching, MultiPattern, Pattern, PatternKind};
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pub use crate::utf32_string::Utf32String;
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pub use crate::utf32_string::Utf32String;
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use crate::worker::Woker;
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use crate::worker::Worker;
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pub use nucleo_matcher::{chars, Matcher, MatcherConfig, Utf32Str};
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pub use nucleo_matcher::{chars, Matcher, MatcherConfig, Utf32Str};
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mod boxcar;
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mod boxcar;
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@ -85,7 +85,7 @@ pub struct Nucleo<T: Sync + Send + 'static> {
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// but this lets us avoid some unsafe
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// but this lets us avoid some unsafe
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canceled: Arc<AtomicBool>,
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canceled: Arc<AtomicBool>,
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should_notify: Arc<AtomicBool>,
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should_notify: Arc<AtomicBool>,
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worker: Arc<Mutex<Woker<T>>>,
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worker: Arc<Mutex<Worker<T>>>,
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pool: ThreadPool,
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pool: ThreadPool,
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cleared: bool,
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cleared: bool,
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item_count: u32,
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item_count: u32,
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@ -104,7 +104,7 @@ impl<T: Sync + Send + 'static> Nucleo<T> {
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case_matching: CaseMatching,
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case_matching: CaseMatching,
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columns: u32,
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columns: u32,
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) -> Self {
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) -> Self {
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let (pool, worker) = Woker::new(num_threads, config, notify.clone(), columns);
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let (pool, worker) = Worker::new(num_threads, config, notify.clone(), columns);
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Self {
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Self {
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canceled: worker.canceled.clone(),
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canceled: worker.canceled.clone(),
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should_notify: worker.should_notify.clone(),
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should_notify: worker.should_notify.clone(),
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@ -137,7 +137,7 @@ impl<T: Sync + Send + 'static> Nucleo<T> {
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/// # Safety
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/// # Safety
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///
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///
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/// Item at `index` must be initialized. That means you must have observed
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/// Item at `index` must be initialized. That means you must have observed
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/// `push` returning this value or `get` retunring `Some` for this value.
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/// `push` returning this value or `get` returning `Some` for this value.
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/// Just because a later index is initialized doesn't mean that this index
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/// Just because a later index is initialized doesn't mean that this index
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/// is initialized
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/// is initialized
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pub unsafe fn get_unchecked(&self, index: u32) -> Item<'_, T> {
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pub unsafe fn get_unchecked(&self, index: u32) -> Item<'_, T> {
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@ -219,7 +219,7 @@ impl<T: Sync + Send + 'static> Nucleo<T> {
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impl<T: Sync + Send> Drop for Nucleo<T> {
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impl<T: Sync + Send> Drop for Nucleo<T> {
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fn drop(&mut self) {
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fn drop(&mut self) {
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// we ensure the worker quits before dropping items to ensure that
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// we ensure the worker quits before dropping items to ensure that
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// the worker can always assume the items outlife it
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// the worker can always assume the items outlive it
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self.canceled.store(true, atomic::Ordering::Relaxed);
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self.canceled.store(true, atomic::Ordering::Relaxed);
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let lock = self.worker.try_lock_for(Duration::from_secs(1));
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let lock = self.worker.try_lock_for(Duration::from_secs(1));
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if lock.is_none() {
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if lock.is_none() {
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@ -228,8 +228,8 @@ impl<T: Sync + Send> Drop for Nucleo<T> {
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}
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}
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}
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}
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/// convenicne function to easily fuzzy match
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/// convenience function to easily fuzzy match
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/// on a (relatively small list of inputs). This is not recommended for building a full tui
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/// on a (relatively small) list of inputs. This is not recommended for building a full tui
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/// application that can match large numbers of matches as all matching is done on the current
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/// application that can match large numbers of matches as all matching is done on the current
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/// thread, effectively blocking the UI
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/// thread, effectively blocking the UI
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pub fn fuzzy_match<T: AsRef<str>>(
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pub fn fuzzy_match<T: AsRef<str>>(
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//!
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//!
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//! This implementation is copied verbatim from `std::slice::sort_unstable` and then parallelized.
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//! This implementation is copied verbatim from `std::slice::sort_unstable` and then parallelized.
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//! The only difference from the original is that calls to `recurse` are executed in parallel using
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//! The only difference from the original is that calls to `recurse` are executed in parallel using
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//! `rayon_core::join`a.
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//! `rayon_core::join`.
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//! Further modified for nucleo to allow canceling the sort
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//! Further modified for nucleo to allow canceling the sort
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// Copyright (c) 2010 The Rust Project Developers
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// Copyright (c) 2010 The Rust Project Developers
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@ -36,7 +36,7 @@ impl Utf32String {
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}
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}
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}
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}
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/// Same as `slice` but accepts a u32 range for convenicene sine
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/// Same as `slice` but accepts a u32 range for convenience since
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/// those are the indices returned by the matcher
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/// those are the indices returned by the matcher
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#[inline]
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#[inline]
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pub fn slice(&self, range: impl RangeBounds<u32>) -> Utf32Str {
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pub fn slice(&self, range: impl RangeBounds<u32>) -> Utf32Str {
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@ -14,7 +14,7 @@ use crate::{boxcar, Match};
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struct Matchers(Box<[UnsafeCell<nucleo_matcher::Matcher>]>);
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struct Matchers(Box<[UnsafeCell<nucleo_matcher::Matcher>]>);
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impl Matchers {
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impl Matchers {
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// thiss is not a true mut from ref, we use a cell here
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// this is not a true mut from ref, we use a cell here
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#[allow(clippy::mut_from_ref)]
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#[allow(clippy::mut_from_ref)]
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unsafe fn get(&self) -> &mut nucleo_matcher::Matcher {
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unsafe fn get(&self) -> &mut nucleo_matcher::Matcher {
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&mut *self.0[rayon::current_thread_index().unwrap()].get()
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&mut *self.0[rayon::current_thread_index().unwrap()].get()
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@ -24,7 +24,7 @@ impl Matchers {
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unsafe impl Sync for Matchers {}
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unsafe impl Sync for Matchers {}
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unsafe impl Send for Matchers {}
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unsafe impl Send for Matchers {}
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|
||||||
pub(crate) struct Woker<T: Sync + Send + 'static> {
|
pub(crate) struct Worker<T: Sync + Send + 'static> {
|
||||||
pub(crate) running: bool,
|
pub(crate) running: bool,
|
||||||
matchers: Matchers,
|
matchers: Matchers,
|
||||||
pub(crate) matches: Vec<Match>,
|
pub(crate) matches: Vec<Match>,
|
||||||
@ -38,7 +38,7 @@ pub(crate) struct Woker<T: Sync + Send + 'static> {
|
|||||||
in_flight: Vec<u32>,
|
in_flight: Vec<u32>,
|
||||||
}
|
}
|
||||||
|
|
||||||
impl<T: Sync + Send + 'static> Woker<T> {
|
impl<T: Sync + Send + 'static> Worker<T> {
|
||||||
pub(crate) fn item_count(&self) -> u32 {
|
pub(crate) fn item_count(&self) -> u32 {
|
||||||
self.last_snapshot - self.in_flight.len() as u32
|
self.last_snapshot - self.in_flight.len() as u32
|
||||||
}
|
}
|
||||||
@ -64,7 +64,7 @@ impl<T: Sync + Send + 'static> Woker<T> {
|
|||||||
let matchers = (0..worker_threads)
|
let matchers = (0..worker_threads)
|
||||||
.map(|_| UnsafeCell::new(nucleo_matcher::Matcher::new(config)))
|
.map(|_| UnsafeCell::new(nucleo_matcher::Matcher::new(config)))
|
||||||
.collect();
|
.collect();
|
||||||
let worker = Woker {
|
let worker = Worker {
|
||||||
running: false,
|
running: false,
|
||||||
matchers: Matchers(matchers),
|
matchers: Matchers(matchers),
|
||||||
last_snapshot: 0,
|
last_snapshot: 0,
|
||||||
@ -211,7 +211,7 @@ impl<T: Sync + Send + 'static> Woker<T> {
|
|||||||
if match2.idx == u32::MAX {
|
if match2.idx == u32::MAX {
|
||||||
return true;
|
return true;
|
||||||
}
|
}
|
||||||
// the tie breaker is comparitevly rarely needed so we keep it
|
// the tie breaker is comparatively rarely needed so we keep it
|
||||||
// in a branch especially because we need to access the items
|
// in a branch especially because we need to access the items
|
||||||
// array here which involves some pointer chasing
|
// array here which involves some pointer chasing
|
||||||
let item1 = self.items.get_unchecked(match1.idx);
|
let item1 = self.items.get_unchecked(match1.idx);
|
||||||
|
Loading…
Reference in New Issue
Block a user