# UNDF: UNDF-2026-000001061
--- a/src/core/hle/service/am/am.cpp
+++ b/src/core/hle/service/am/am.cpp
@@ -1,6 +1,7 @@
 // Copyright Citra Emulator Project / Azahar Emulator Project
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
+#include <unordered_set>

 // ... (other includes unchanged)

@@ -3728,8 +3728,10 @@ void Module::Interface::CommitImportTitlesImpl(Kernel::HLERequestContext& ctx,
     auto& title_id_buf = rp.PopMappedBuffer();

     std::vector<u64> title_ids(title_id_buf.GetSize() / sizeof(u64));
     title_id_buf.Read(title_ids.data(), 0, title_id_buf.GetSize());

+    // Build a hash set for O(1) membership test instead of O(T) per lookup.
+    const std::unordered_set<u64> title_id_set(title_ids.begin(), title_ids.end());
+
     for (auto& key_value : am->import_content_contexts) {
-        if (std::find(title_ids.begin(), title_ids.end(), key_value.first) != title_ids.end() &&
+        if (title_id_set.count(key_value.first) &&
             key_value.second.state == ImportTitleContextState::WAITING_FOR_COMMIT) {
             key_value.second.state = ImportTitleContextState::NEEDS_CLEANUP;
         }
     }