diff --git a/SPID/CMakeLists.txt b/SPID/CMakeLists.txt
index fa562a9..df6aa8a 100644
--- a/SPID/CMakeLists.txt
+++ b/SPID/CMakeLists.txt
@@ -134,6 +134,7 @@ else ()
 endif()
 
 find_package(frozen CONFIG REQUIRED)
+find_package(robin_hood CONFIG REQUIRED)
 
 find_path(SIMPLEINI_INCLUDE_DIRS "ConvertUTF.c")
 find_path(SRELL_INCLUDE_DIRS "srell.hpp")
@@ -202,6 +203,7 @@ target_link_libraries(
 	PRIVATE
 		${CommonLibName}::${CommonLibName}
 		frozen::frozen
+		robin_hood::robin_hood
 )
 
 target_precompile_headers(
diff --git a/SPID/include/Defs.h b/SPID/include/Defs.h
index f3c7148..8f044e8 100644
--- a/SPID/include/Defs.h
+++ b/SPID/include/Defs.h
@@ -73,25 +73,12 @@ namespace DATA
 	};
 }
 
-/// Trait that is used to infer default sorter for Forms.
-template <class TForm>
-struct form_sorter
-{
-	using Sorter = std::less<TForm*>;
-};
-
 /// Custom ordering for keywords that ensures that dependent keywords are disitrbuted after the keywords that they depend on.
 struct KeywordDependencySorter
 {
 	static bool sort(RE::BGSKeyword* a, RE::BGSKeyword* b);
 };
 
-template <>
-struct form_sorter<RE::BGSKeyword>
-{
-	using Sorter = KeywordDependencySorter;
-};
-
 using EventResult = RE::BSEventNotifyControl;
 
 using FormIDPair = std::pair<std::optional<RE::FormID>,std::optional<std::string>>;
@@ -128,6 +115,11 @@ using StringFilters = std::array<StringVec, 4>;
 using FormFilters = std::array<FormVec, 3>;
 using LevelFilters = std::pair<ActorLevel, std::vector<SkillLevel>>;
 
+template <class K, class D>
+using Map = robin_hood::unordered_flat_map<K, D>;
+template <class K>
+using Set = robin_hood::unordered_flat_set<K>;
+
 template <class Form>
 struct FormData
 {
diff --git a/SPID/include/PCH.h b/SPID/include/PCH.h
index c360f7e..5b7ebb7 100644
--- a/SPID/include/PCH.h
+++ b/SPID/include/PCH.h
@@ -11,6 +11,7 @@
 #include <ClibUtil/utils.hpp>
 #include <SimpleIni.h>
 #include <frozen/set.h>
+#include <robin_hood.h>
 #include <spdlog/sinks/basic_file_sink.h>
 #include <srell.hpp>
 #include <xbyak/xbyak.h>
diff --git a/SPID/include/PCLevelMultManager.h b/SPID/include/PCLevelMultManager.h
index 94a9e19..fe849b3 100644
--- a/SPID/include/PCLevelMultManager.h
+++ b/SPID/include/PCLevelMultManager.h
@@ -32,7 +32,7 @@ namespace PCLevelMult
 		void DumpRejectedEntries();
 
 		[[nodiscard]] bool FindDistributedEntry(const Input& a_input);
-		bool InsertDistributedEntry(const Input& a_input, RE::FormID a_distributedFormID, IdxOrCount a_idx);
+		void InsertDistributedEntry(const Input& a_input, RE::FormID a_distributedFormID, IdxOrCount a_idx);
 		void ForEachDistributedEntry(const Input& a_input, std::function<void(RE::TESForm&, IdxOrCount a_idx, bool)> a_fn) const;
 		void DumpDistributedEntries();
 
@@ -48,7 +48,7 @@ namespace PCLevelMult
 		static std::uint64_t get_game_playerID();
 		void remap_player_ids(std::uint64_t a_oldID, std::uint64_t a_newID);
 
-	    EventResult ProcessEvent(const RE::MenuOpenCloseEvent* a_event, RE::BSTEventSource<RE::MenuOpenCloseEvent>*) override;
+		EventResult ProcessEvent(const RE::MenuOpenCloseEvent* a_event, RE::BSTEventSource<RE::MenuOpenCloseEvent>*) override;
 
 	private:
 		Manager() = default;
@@ -70,20 +70,20 @@ namespace PCLevelMult
 		{
 			struct Entries
 			{
-				std::unordered_map<RE::FormID, std::set<std::uint32_t>> rejectedEntries{};  // Distributed formID, FormData vector index
-				std::set<std::pair<RE::FormID, IdxOrCount>> distributedEntries{};           // Distributed formID, distributed count/idx
+				Map<RE::FormID, Set<std::uint32_t>> rejectedEntries{};                // Distributed formID, FormData vector index
+				std::vector<std::pair<RE::FormID, IdxOrCount>> distributedEntries{};  // Distributed formID, distributed count/idx
 			};
 
-		    LEVEL_CAP_STATE levelCapState{};
-			std::map<std::uint16_t, Entries> entries{};  // Actor Level, Entries
+			LEVEL_CAP_STATE levelCapState{};
+			Map<std::uint16_t, Entries> entries{};  // Actor Level, Entries
 		};
 
-		std::unordered_map<std::uint64_t,          // PlayerID
-			std::unordered_map<RE::FormID, Data>>  // NPC formID, Data
+		Map<std::uint64_t,          // PlayerID
+			Map<RE::FormID, Data>>  // NPC formID, Data
 			cache{};
 
 		std::uint64_t currentPlayerID{ 0 };
-	    std::uint64_t oldPlayerID{ 0 };
+		std::uint64_t oldPlayerID{ 0 };
 
 		bool newGameStarted{ false };
 	};
diff --git a/SPID/src/PCLevelMultManager.cpp b/SPID/src/PCLevelMultManager.cpp
index 1828037..6afd8df 100644
--- a/SPID/src/PCLevelMultManager.cpp
+++ b/SPID/src/PCLevelMultManager.cpp
@@ -123,13 +123,13 @@ namespace PCLevelMult
 		return false;
 	}
 
-	bool Manager::InsertDistributedEntry(const Input& a_input, RE::FormID a_distributedFormID, IdxOrCount a_idx)
+	void Manager::InsertDistributedEntry(const Input& a_input, RE::FormID a_distributedFormID, IdxOrCount a_idx)
 	{
 		if (a_input.noPlayerLevelDistribution) {
-			return false;
+			return;
 		}
 
-		return cache[a_input.playerID][a_input.npcFormID].entries[a_input.npcLevel].distributedEntries.insert({ a_distributedFormID, a_idx }).second;
+		cache[a_input.playerID][a_input.npcFormID].entries[a_input.npcLevel].distributedEntries.push_back({ a_distributedFormID, a_idx });
 	}
 
 	void Manager::ForEachDistributedEntry(const Input& a_input, std::function<void(RE::TESForm&, IdxOrCount a_idx, bool)> a_fn) const
diff --git a/vcpkg.json b/vcpkg.json
index 222ba36..4210170 100644
--- a/vcpkg.json
+++ b/vcpkg.json
@@ -6,6 +6,7 @@
     "clib-util",
     "frozen",
     "mergemapper",
+    "robin-hood-hashing",
     "rsm-binary-io",
     "simpleini",
     "srell",