minimize extra dv::value copies

src/logic/scripting/lua/libentity.cpp

@@ -54,7 +54,7 @@ static int l_spawn(lua::State* L) {
     if (lua::gettop(L) > 2) {
         args = lua::tovalue(L, 3);
     }
-    level->entities->spawn(def, pos, args);
+    level->entities->spawn(def, pos, std::move(args));
     return 1;
 }
 

src/logic/scripting/scripting.cpp

@@ -340,8 +340,8 @@ void scripting::on_entity_spawn(
     const EntityDef&,
     entityid_t eid,
     const std::vector<std::unique_ptr<UserComponent>>& components,
-    dv::value args,
-    dv::value saved
+    const dv::value& args,
+    const dv::value& saved
 ) {
     auto L = lua::get_main_thread();
     lua::requireglobal(L, STDCOMP);

src/logic/scripting/scripting.hpp

@@ -94,8 +94,8 @@ namespace scripting {
         const EntityDef& def,
         entityid_t eid,
         const std::vector<std::unique_ptr<UserComponent>>& components,
-        dv::value args,
-        dv::value saved
+        const dv::value& args,
+        const dv::value& saved
     );
     void on_entity_despawn(const Entity& entity);
     void on_entity_grounded(const Entity& entity, float force);