From 0cc8976359f3c985b79e2bda6d65a74df83f6cb0 Mon Sep 17 00:00:00 2001
From: LingyuCoder <lingyucoder@gmail.com>
Date: Wed, 17 Sep 2025 15:58:01 +0800
Subject: [PATCH] perf: improve get mode

---
 .../esm/esm_export_imported_specifier_dependency.rs         | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/crates/rspack_plugin_javascript/src/dependency/esm/esm_export_imported_specifier_dependency.rs b/crates/rspack_plugin_javascript/src/dependency/esm/esm_export_imported_specifier_dependency.rs
index 58cdeea22963..ca2a17bf207e 100644
--- a/crates/rspack_plugin_javascript/src/dependency/esm/esm_export_imported_specifier_dependency.rs
+++ b/crates/rspack_plugin_javascript/src/dependency/esm/esm_export_imported_specifier_dependency.rs
@@ -1459,8 +1459,14 @@ fn determine_export_assignments(
   let mut dependency_indices =
     Vec::with_capacity(dependencies.len() + usize::from(additional_dependency.is_some()));
 
+  let mut handled_modules = IdentifierSet::default();
+
   for dependency in dependencies.iter().chain(additional_dependency.iter()) {
     if let Some(module_identifier) = module_graph.module_identifier_by_dependency_id(dependency) {
+      if !handled_modules.insert(*module_identifier) {
+        dependency_indices.push(names.len());
+        continue;
+      }
       let exports_info = module_graph
         .get_exports_info(module_identifier)
         .as_data(module_graph);