diff --git a/src/alias_registry.hh b/src/alias_registry.hh
index 1e292533..f29ee9e6 100644
--- a/src/alias_registry.hh
+++ b/src/alias_registry.hh
@@ -23,7 +23,7 @@ private:
     AliasRegistry() {}
 
     safe_ptr<AliasRegistry> m_parent;
-    UnorderedMap<String, String> m_aliases;
+    UnorderedMap<String, String, MemoryDomain::Aliases> m_aliases;
 };
 
 }
diff --git a/src/client.hh b/src/client.hh
index 3a614314..85040ad4 100644
--- a/src/client.hh
+++ b/src/client.hh
@@ -70,7 +70,7 @@ private:
     DisplayLine m_pending_status_line;
     DisplayLine m_mode_line;
 
-    Vector<Key> m_pending_keys;
+    Vector<Key, MemoryDomain::Client> m_pending_keys;
 };
 
 }
diff --git a/src/client_manager.hh b/src/client_manager.hh
index 1d1147b5..fae31e00 100644
--- a/src/client_manager.hh
+++ b/src/client_manager.hh
@@ -49,7 +49,7 @@ private:
     String generate_name() const;
 
     Vector<std::unique_ptr<Client>> m_clients;
-    Vector<WindowAndSelections> m_free_windows;
+    Vector<WindowAndSelections, MemoryDomain::Client> m_free_windows;
 };
 
 }
diff --git a/src/commands.cc b/src/commands.cc
index e9fc5fa2..af6b6167 100644
--- a/src/commands.cc
+++ b/src/commands.cc
@@ -30,7 +30,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 
-#if defined(__GLIBC__)
+#if defined(__GLIBC__) || defined(__CYGWIN__)
 #include <malloc.h>
 #endif
 
@@ -838,7 +838,7 @@ const CommandDesc debug_cmd = {
                 write_debug("  "_sv + domain_name((MemoryDomain)domain) + ": " + to_string(count));
             }
             write_debug("  Total: " + to_string(total));
-            #if defined(__GLIBC__)
+            #if defined(__GLIBC__) || defined(__CYGWIN__)
             write_debug("  Malloced: " + to_string(mallinfo().uordblks));
             #endif
         }
diff --git a/src/env_vars.hh b/src/env_vars.hh
index cbab16ed..43bbe2de 100644
--- a/src/env_vars.hh
+++ b/src/env_vars.hh
@@ -7,7 +7,7 @@ namespace Kakoune
 {
 
 class String;
-using EnvVarMap = UnorderedMap<String, String>;
+using EnvVarMap = UnorderedMap<String, String, MemoryDomain::EnvVars>;
 
 EnvVarMap get_env_vars();
 
diff --git a/src/face_registry.hh b/src/face_registry.hh
index 0d6a683a..67cb8b86 100644
--- a/src/face_registry.hh
+++ b/src/face_registry.hh
@@ -29,7 +29,7 @@ private:
         FaceOrAlias(Face face = Face{}) : face(face) {}
     };
 
-    UnorderedMap<String, FaceOrAlias> m_aliases;
+    UnorderedMap<String, FaceOrAlias, MemoryDomain::Faces> m_aliases;
 };
 
 inline Face get_face(const String& facedesc)
diff --git a/src/main.cc b/src/main.cc
index ae365cf5..15be8559 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -144,13 +144,16 @@ void register_env_vars()
 
 void register_registers()
 {
-    using StringList = Vector<String>;
+    using StringList = Vector<String, MemoryDomain::Registers>;
     static const struct {
         char name;
         StringList (*func)(const Context&);
     } dyn_regs[] = {
         { '%', [](const Context& context) { return StringList{{context.buffer().display_name()}}; } },
-        { '.', [](const Context& context) { return context.selections_content(); } },
+        { '.', [](const Context& context) {
+            auto content = context.selections_content();
+            return StringList{content.begin(), content.end()};
+        } },
         { '#', [](const Context& context) {
             StringList res;
             for (size_t i = 1; i < context.selections().size()+1; ++i)
@@ -167,7 +170,7 @@ void register_registers()
     {
         register_manager.register_dynamic_register('0'+i,
             [i](const Context& context) {
-                Vector<String> result;
+                StringList result;
                 for (auto& sel : context.selections())
                     result.emplace_back(i < sel.captures().size() ? sel.captures()[i] : "");
                 return result;
diff --git a/src/memory.hh b/src/memory.hh
index 9c0ec462..f6ccb039 100644
--- a/src/memory.hh
+++ b/src/memory.hh
@@ -23,6 +23,12 @@ enum class MemoryDomain
     Mapping,
     Commands,
     Hooks,
+    Aliases,
+    EnvVars,
+    Faces,
+    Values,
+    Registers,
+    Client,
     WordDB,
     Count
 };
@@ -42,6 +48,12 @@ inline const char* domain_name(MemoryDomain domain)
         case MemoryDomain::Commands: return "Commands";
         case MemoryDomain::Hooks: return "Hooks";
         case MemoryDomain::WordDB: return "WordDB";
+        case MemoryDomain::Aliases: return "Aliases";
+        case MemoryDomain::EnvVars: return "EnvVars";
+        case MemoryDomain::Faces: return "Faces";
+        case MemoryDomain::Values: return "Values";
+        case MemoryDomain::Registers: return "Registers";
+        case MemoryDomain::Client: return "Client";
         case MemoryDomain::Count: break;
     }
     kak_assert(false);
diff --git a/src/option_types.hh b/src/option_types.hh
index eda362f3..9151cd1c 100644
--- a/src/option_types.hh
+++ b/src/option_types.hh
@@ -67,8 +67,8 @@ bool option_add(Vector<T, domain>& opt, const Vector<T, domain>& vec)
     return not vec.empty();
 }
 
-template<typename Key, typename Value>
-String option_to_string(const UnorderedMap<Key, Value>& opt)
+template<typename Key, typename Value, MemoryDomain domain>
+String option_to_string(const UnorderedMap<Key, Value, domain>& opt)
 {
     String res;
     for (auto it = begin(opt); it != end(opt); ++it)
@@ -82,8 +82,8 @@ String option_to_string(const UnorderedMap<Key, Value>& opt)
     return res;
 }
 
-template<typename Key, typename Value>
-void option_from_string(StringView str, UnorderedMap<Key, Value>& opt)
+template<typename Key, typename Value, MemoryDomain domain>
+void option_from_string(StringView str, UnorderedMap<Key, Value, domain>& opt)
 {
     opt.clear();
     for (auto& elem : split(str, list_separator, '\\'))
diff --git a/src/register_manager.cc b/src/register_manager.cc
index c98c3964..af87dbb5 100644
--- a/src/register_manager.cc
+++ b/src/register_manager.cc
@@ -14,7 +14,7 @@ class StaticRegister : public Register
 public:
     Register& operator=(ArrayView<String> values) override
     {
-        m_content = Vector<String>(values.begin(), values.end());
+        m_content = Vector<String, MemoryDomain::Registers>(values.begin(), values.end());
         return *this;
     }
 
@@ -26,7 +26,7 @@ public:
             return ArrayView<String>(m_content);
     }
 protected:
-    Vector<String> m_content;
+    Vector<String, MemoryDomain::Registers> m_content;
 
     static const String ms_empty;
 };
@@ -53,7 +53,7 @@ public:
     }
 
 private:
-    RegisterRetriever   m_function;
+    RegisterRetriever m_function;
 };
 
 Register& RegisterManager::operator[](StringView reg)
diff --git a/src/register_manager.hh b/src/register_manager.hh
index f8b891ee..52217374 100644
--- a/src/register_manager.hh
+++ b/src/register_manager.hh
@@ -11,7 +11,7 @@
 namespace Kakoune
 {
 
-using RegisterRetriever = std::function<Vector<String> (const Context&)>;
+using RegisterRetriever = std::function<Vector<String, MemoryDomain::Registers> (const Context&)>;
 
 class RegisterManager : public Singleton<RegisterManager>
 {
@@ -21,7 +21,7 @@ public:
     void register_dynamic_register(char reg, RegisterRetriever function);
 
 protected:
-    UnorderedMap<char, std::unique_ptr<Register>> m_registers;
+    UnorderedMap<char, std::unique_ptr<Register>, MemoryDomain::Registers> m_registers;
 };
 
 }
diff --git a/src/remote.cc b/src/remote.cc
index b7d4cccf..e2aa10cc 100644
--- a/src/remote.cc
+++ b/src/remote.cc
@@ -75,14 +75,14 @@ public:
             write(val);
     }
 
-    template<typename T>
-    void write(const Vector<T>& vec)
+    template<typename T, MemoryDomain domain>
+    void write(const Vector<T, domain>& vec)
     {
         write(ArrayView<T>(vec));
     }
 
-    template<typename Key, typename Val>
-    void write(const UnorderedMap<Key, Val>& map)
+    template<typename Key, typename Val, MemoryDomain domain>
+    void write(const UnorderedMap<Key, Val, domain>& map)
     {
         write<uint32_t>(map.size());
         for (auto& val : map)
@@ -229,11 +229,11 @@ DisplayBuffer read<DisplayBuffer>(int socket)
     return db;
 }
 
-template<typename Key, typename Val>
-UnorderedMap<Key, Val> read_map(int socket)
+template<typename Key, typename Val, MemoryDomain domain>
+UnorderedMap<Key, Val, domain> read_map(int socket)
 {
     uint32_t size = read<uint32_t>(socket);
-    UnorderedMap<Key, Val> res;
+    UnorderedMap<Key, Val, domain> res;
     while (size--)
     {
         auto key = read<Key>(socket);
@@ -519,7 +519,7 @@ void RemoteClient::process_next_message()
         m_ui->refresh();
         break;
     case RemoteUIMsg::SetOptions:
-        m_ui->set_ui_options(read_map<String, String>(socket));
+        m_ui->set_ui_options(read_map<String, String, MemoryDomain::Options>(socket));
         break;
     }
 }
@@ -595,7 +595,7 @@ private:
             }
             if (c == 0) // end of initial command stream, go to interactive ui
             {
-                EnvVarMap env_vars = read_map<String, String>(socket);
+                EnvVarMap env_vars = read_map<String, String, MemoryDomain::EnvVars>(socket);
                 std::unique_ptr<UserInterface> ui{new RemoteUI{socket}};
                 ClientManager::instance().create_client(std::move(ui),
                                                         std::move(env_vars),
diff --git a/src/user_interface.hh b/src/user_interface.hh
index a912b417..6734bf14 100644
--- a/src/user_interface.hh
+++ b/src/user_interface.hh
@@ -63,7 +63,7 @@ public:
 
     virtual void set_input_callback(InputCallback callback) = 0;
 
-    using Options = UnorderedMap<String, String>;
+    using Options = UnorderedMap<String, String, MemoryDomain::Options>;
     virtual void set_ui_options(const Options& options) = 0;
 };
 
diff --git a/src/value.hh b/src/value.hh
index e663513a..541da3d8 100644
--- a/src/value.hh
+++ b/src/value.hh
@@ -60,6 +60,10 @@ private:
         const std::type_info& type() const override { return typeid(T); }
 
         T m_content;
+
+        using Alloc = Allocator<Model<T>, MemoryDomain::Values>;
+        static void* operator new (std::size_t sz) { return Alloc{}.allocate(1); }
+        static void operator delete (void* ptr) { Alloc{}.deallocate((Model<T>*)ptr, 1); }
     };
 
     std::unique_ptr<Concept> m_value;
@@ -78,7 +82,7 @@ struct ValueId : public StronglyTypedNumber<ValueId, int>
 
 inline size_t hash_value(ValueId val) { return hash_value((int)val); }
 
-using ValueMap = UnorderedMap<ValueId, Value>;
+using ValueMap = UnorderedMap<ValueId, Value, MemoryDomain::Values>;
 
 }