diff --git a/crates/typst-cli/src/query.rs b/crates/typst-cli/src/query.rs
index b1a446203..0a315aed6 100644
--- a/crates/typst-cli/src/query.rs
+++ b/crates/typst-cli/src/query.rs
@@ -79,6 +79,7 @@ fn retrieve(
     Ok(document
         .introspector
         .query(&selector.0)
+        .into_inner()
         .into_iter()
         .collect::<Vec<_>>())
 }
diff --git a/crates/typst-layout/src/rules.rs b/crates/typst-layout/src/rules.rs
index f21cd17ab..825529b33 100644
--- a/crates/typst-layout/src/rules.rs
+++ b/crates/typst-layout/src/rules.rs
@@ -430,7 +430,7 @@ const OUTLINE_RULE: ShowFn<OutlineElem> = |elem, engine, styles| {
     let depth = elem.depth.get(styles).unwrap_or(NonZeroUsize::MAX);
 
     // Build the outline entries.
-    for elem in elems {
+    for elem in elems.into_inner() {
         let Some(outlinable) = elem.with::<dyn Outlinable>() else {
             bail!(span, "cannot outline {}", elem.func().name());
         };
diff --git a/crates/typst-library/src/introspection/counter.rs b/crates/typst-library/src/introspection/counter.rs
index b3c52de4e..db62902ef 100644
--- a/crates/typst-library/src/introspection/counter.rs
+++ b/crates/typst-library/src/introspection/counter.rs
@@ -312,7 +312,7 @@ impl Counter {
         let mut page = NonZeroUsize::ONE;
         let mut stops = eco_vec![(state.clone(), page)];
 
-        for elem in introspector.query(&self.selector()) {
+        for elem in introspector.query(&self.selector()).into_inner() {
             if self.is_page() {
                 let prev = page;
                 page = introspector.page(elem.location().unwrap());
diff --git a/crates/typst-library/src/introspection/introspector.rs b/crates/typst-library/src/introspection/introspector.rs
index d40347323..7dd9971f9 100644
--- a/crates/typst-library/src/introspection/introspector.rs
+++ b/crates/typst-library/src/introspection/introspector.rs
@@ -4,6 +4,7 @@ use std::hash::Hash;
 use std::num::NonZeroUsize;
 use std::sync::RwLock;
 
+use comemo::Prehashed;
 use ecow::{EcoString, EcoVec};
 use smallvec::SmallVec;
 use typst_utils::NonZeroExt;
@@ -108,7 +109,7 @@ impl Introspector {
 #[comemo::track]
 impl Introspector {
     /// Query for all matching elements.
-    pub fn query(&self, selector: &Selector) -> EcoVec<Content> {
+    pub fn query(&self, selector: &Selector) -> Prehashed<EcoVec<Content>> {
         let hash = typst_utils::hash128(selector);
         if let Some(output) = self.queries.get(hash) {
             return output;
@@ -131,7 +132,7 @@ impl Introspector {
                 .collect(),
             Selector::Or(selectors) => selectors
                 .iter()
-                .flat_map(|sel| self.query(sel))
+                .flat_map(|sel| self.query(sel).into_inner())
                 .map(|elem| self.elem_index(&elem))
                 .collect::<BTreeSet<usize>>()
                 .into_iter()
@@ -139,7 +140,7 @@ impl Introspector {
                 .collect(),
             Selector::And(selectors) => {
                 let mut results: Vec<_> =
-                    selectors.iter().map(|sel| self.query(sel)).collect();
+                    selectors.iter().map(|sel| self.query(sel).into_inner()).collect();
 
                 // Extract the smallest result list and then keep only those
                 // elements in the smallest list that are also in all other
@@ -161,7 +162,7 @@ impl Introspector {
                     .collect()
             }
             Selector::Before { selector, end, inclusive } => {
-                let mut list = self.query(selector);
+                let mut list = self.query(selector).into_inner();
                 if let Some(end) = self.query_first(end) {
                     // Determine which elements are before `end`.
                     let split = match self.binary_search(&list, &end) {
@@ -175,7 +176,7 @@ impl Introspector {
                 list
             }
             Selector::After { selector, start, inclusive } => {
-                let mut list = self.query(selector);
+                let mut list = self.query(selector).into_inner();
                 if let Some(start) = self.query_first(start) {
                     // Determine which elements are after `start`.
                     let split = match self.binary_search(&list, &start) {
@@ -192,6 +193,7 @@ impl Introspector {
             Selector::Can(_) | Selector::Regex(_) => EcoVec::new(),
         };
 
+        let output = Prehashed::new(output);
         self.queries.insert(hash, output.clone());
         output
     }
@@ -223,6 +225,7 @@ impl Introspector {
                     bail!("selector matches multiple elements",);
                 }
                 elems
+                    .into_inner()
                     .into_iter()
                     .next()
                     .ok_or_else(|| "selector does not match any element".into())
@@ -340,14 +343,14 @@ impl<K, V> Default for MultiMap<K, V> {
 
 /// Caches queries.
 #[derive(Default)]
-struct QueryCache(RwLock<HashMap<u128, EcoVec<Content>>>);
+struct QueryCache(RwLock<HashMap<u128, Prehashed<EcoVec<Content>>>>);
 
 impl QueryCache {
-    fn get(&self, hash: u128) -> Option<EcoVec<Content>> {
+    fn get(&self, hash: u128) -> Option<Prehashed<EcoVec<Content>>> {
         self.0.read().unwrap().get(&hash).cloned()
     }
 
-    fn insert(&self, hash: u128, output: EcoVec<Content>) {
+    fn insert(&self, hash: u128, output: Prehashed<EcoVec<Content>>) {
         self.0.write().unwrap().insert(hash, output);
     }
 }
diff --git a/crates/typst-library/src/introspection/query.rs b/crates/typst-library/src/introspection/query.rs
index b742ac010..618aec3b9 100644
--- a/crates/typst-library/src/introspection/query.rs
+++ b/crates/typst-library/src/introspection/query.rs
@@ -149,5 +149,5 @@ pub fn query(
 ) -> HintedStrResult<Array> {
     context.introspect()?;
     let vec = engine.introspector.query(&target.0);
-    Ok(vec.into_iter().map(Value::Content).collect())
+    Ok(vec.into_inner().into_iter().map(Value::Content).collect())
 }
diff --git a/crates/typst-library/src/introspection/state.rs b/crates/typst-library/src/introspection/state.rs
index 2d15a5de0..67d0bc3f0 100644
--- a/crates/typst-library/src/introspection/state.rs
+++ b/crates/typst-library/src/introspection/state.rs
@@ -242,7 +242,7 @@ impl State {
         let mut state = self.init.clone();
         let mut stops = eco_vec![state.clone()];
 
-        for elem in introspector.query(&self.selector()) {
+        for elem in introspector.query(&self.selector()).into_inner() {
             let elem = elem.to_packed::<StateUpdateElem>().unwrap();
             match &elem.update {
                 StateUpdate::Set(value) => state = value.clone(),
diff --git a/crates/typst-library/src/model/bibliography.rs b/crates/typst-library/src/model/bibliography.rs
index 188af4da1..d2e015684 100644
--- a/crates/typst-library/src/model/bibliography.rs
+++ b/crates/typst-library/src/model/bibliography.rs
@@ -563,7 +563,7 @@ impl<'a> Generator<'a> {
         introspector: Tracked<Introspector>,
     ) -> StrResult<Self> {
         let bibliography = BibliographyElem::find(introspector)?;
-        let groups = introspector.query(&CiteGroup::ELEM.select());
+        let groups = introspector.query(&CiteGroup::ELEM.select()).into_inner();
         let infos = Vec::with_capacity(groups.len());
         Ok(Self {
             routines,
diff --git a/crates/typst-library/src/model/outline.rs b/crates/typst-library/src/model/outline.rs
index 4bda02ba3..35ad9714f 100644
--- a/crates/typst-library/src/model/outline.rs
+++ b/crates/typst-library/src/model/outline.rs
@@ -656,7 +656,7 @@ fn query_prefix_widths(
 ) -> SmallVec<[Option<Abs>; 4]> {
     let mut widths = SmallVec::<[Option<Abs>; 4]>::new();
     let elems = introspector.query(&select_where!(PrefixInfo, key => outline_loc));
-    for elem in &elems {
+    for elem in &elems.into_inner() {
         let info = elem.to_packed::<PrefixInfo>().unwrap();
         let level = info.level.get();
         if widths.len() < level {
diff --git a/crates/typst-pdf/src/embed.rs b/crates/typst-pdf/src/embed.rs
index c62178cf2..19dcf2026 100644
--- a/crates/typst-pdf/src/embed.rs
+++ b/crates/typst-pdf/src/embed.rs
@@ -13,7 +13,7 @@ pub(crate) fn embed_files(
 ) -> SourceResult<()> {
     let elements = typst_doc.introspector.query(&EmbedElem::ELEM.select());
 
-    for elem in &elements {
+    for elem in &elements.into_inner() {
         let embed = elem.to_packed::<EmbedElem>().unwrap();
         let span = embed.span();
         let derived_path = &embed.path.derived;