From f7d078ca1471ca16be7699aee13b3f9dad6cd255 Mon Sep 17 00:00:00 2001
From: Dunqing <29533304+Dunqing@users.noreply.github.com>
Date: Thu, 20 Mar 2025 06:52:53 +0000
Subject: [PATCH] perf(semantic): use `reserve_exact` instead of `reserve` to
 save memory in pre-reserve (#9910)

---
 crates/oxc_semantic/src/scoping.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/crates/oxc_semantic/src/scoping.rs b/crates/oxc_semantic/src/scoping.rs
index 7cf6096f04026..4e306e35ae59f 100644
--- a/crates/oxc_semantic/src/scoping.rs
+++ b/crates/oxc_semantic/src/scoping.rs
@@ -383,8 +383,8 @@ impl Scoping {
         self.symbol_scope_ids.reserve(additional_symbols);
         self.symbol_declarations.reserve(additional_symbols);
         self.cell.with_dependent_mut(|_allocator, cell| {
-            cell.symbol_names.reserve(additional_symbols);
-            cell.resolved_references.reserve(additional_symbols);
+            cell.symbol_names.reserve_exact(additional_symbols);
+            cell.resolved_references.reserve_exact(additional_symbols);
         });
         self.references.reserve(additional_references);
 
@@ -396,7 +396,7 @@ impl Scoping {
         self.scope_node_ids.reserve(additional_scopes);
         if self.scope_build_child_ids {
             self.cell.with_dependent_mut(|_allocator, cell| {
-                cell.scope_child_ids.reserve(additional_scopes);
+                cell.scope_child_ids.reserve_exact(additional_scopes);
             });
         }
     }