From d0ff59cfe538203667e93703af495719c1f2ea3f Mon Sep 17 00:00:00 2001
From: Micha Reiser <micha@reiser.io>
Date: Wed, 7 Jan 2026 17:22:35 +0100
Subject: [PATCH] [ty] Use `Pool` from `regex_automata` to reuse the `matches`
 allocations (#22438)

---
 crates/ty_project/src/glob/exclude.rs |  6 +++---
 crates/ty_project/src/glob/include.rs | 12 +++++++++---
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/crates/ty_project/src/glob/exclude.rs b/crates/ty_project/src/glob/exclude.rs
index ab657c0c76..3f279ad051 100644
--- a/crates/ty_project/src/glob/exclude.rs
+++ b/crates/ty_project/src/glob/exclude.rs
@@ -124,7 +124,7 @@ struct Gitignore {
     set: GlobSet,
     globs: Vec<IgnoreGlob>,
     #[get_size(ignore)]
-    matches: Option<Arc<Pool<Vec<usize>>>>,
+    matches: Arc<Pool<Vec<usize>>>,
 }
 
 impl Gitignore {
@@ -140,7 +140,7 @@ impl Gitignore {
             return Match::None;
         }
 
-        let mut matches = self.matches.as_ref().unwrap().get();
+        let mut matches = self.matches.get();
         let candidate = Candidate::new(path);
         self.set.matches_candidate_into(&candidate, &mut matches);
         for &i in matches.iter().rev() {
@@ -232,7 +232,7 @@ impl GitignoreBuilder {
         Ok(Gitignore {
             set,
             globs: self.globs.clone(),
-            matches: Some(Arc::new(Pool::new(Vec::new))),
+            matches: Arc::new(Pool::new(Vec::new)),
         })
     }
 
diff --git a/crates/ty_project/src/glob/include.rs b/crates/ty_project/src/glob/include.rs
index c828f9f128..73c1863168 100644
--- a/crates/ty_project/src/glob/include.rs
+++ b/crates/ty_project/src/glob/include.rs
@@ -1,9 +1,11 @@
 use globset::{Glob, GlobBuilder, GlobSet, GlobSetBuilder};
 use regex_automata::dfa;
 use regex_automata::dfa::Automaton;
+use regex_automata::util::pool::Pool;
 use ruff_db::system::SystemPath;
 use std::fmt::Formatter;
 use std::path::{MAIN_SEPARATOR, MAIN_SEPARATOR_STR};
+use std::sync::Arc;
 use tracing::warn;
 
 use crate::glob::portable::AbsolutePortableGlobPattern;
@@ -37,6 +39,8 @@ pub(crate) struct IncludeFilter {
     literal_pattern_indices: Box<[usize]>,
     #[get_size(size_fn = dfa_memory_usage)]
     dfa: Option<dfa::dense::DFA<Vec<u32>>>,
+    #[get_size(ignore)]
+    matches: Arc<Pool<Vec<usize>>>,
 }
 
 #[allow(clippy::ref_option)]
@@ -57,13 +61,14 @@ impl IncludeFilter {
             };
         }
 
-        let matches = self.glob_set.matches(path);
+        let mut matches = self.matches.get();
+        self.glob_set.matches_into(path, &mut matches);
 
         if matches.is_empty() {
             MatchFile::No
         } else {
-            for match_index in matches {
-                if self.literal_pattern_indices.contains(&match_index) {
+            for match_index in matches.iter() {
+                if self.literal_pattern_indices.contains(match_index) {
                     return MatchFile::Literal;
                 }
             }
@@ -291,6 +296,7 @@ impl IncludeFilterBuilder {
             dfa,
             literal_pattern_indices: self.literal_pattern_indices.into(),
             original_patterns: self.original_patterns.into(),
+            matches: Arc::new(Pool::new(Vec::new)),
         })
     }
 }