removed string lookup

Signed-off-by: Santiago Figueroa Manrique <santiago.figueroa.manrique@alliander.com>

Author: figueroa1395

power_grid_model_c/power_grid_model/include/power_grid_model/main_core/update.hpp

@@ -235,18 +235,13 @@ UpdateCompProperties check_component_independence(ConstDataset const& update_dat
 template <typename... ComponentType> using ComponentFlags = std::array<bool, sizeof...(ComponentType)>;
 
 template <class... ComponentType>
-ComponentFlags<ComponentType...>
-is_update_independent(ConstDataset const& update_data,
-                      std::map<std::string, Idx, std::less<>> const& relevant_component_count_map) {
+ComponentFlags<ComponentType...> is_update_independent(ConstDataset const& update_data,
+                                                       std::span<bool const> relevant_component_count) {
     ComponentFlags<ComponentType...> result{};
     size_t idx{};
     utils::run_functor_with_all_types_return_void<ComponentType...>(
-        [&result, &relevant_component_count_map, &update_data, &idx]<typename CompType>() {
-            Idx n_component{};
-            auto it = relevant_component_count_map.find(CompType::name);
-            if (it != relevant_component_count_map.end()) {
-                n_component = it->second;
-            }
+        [&result, &relevant_component_count, &update_data, &idx]<typename CompType>() {
+            Idx n_component = relevant_component_count[idx];
             result[idx] = check_component_independence<CompType>(update_data, n_component).is_independent();
             ++idx;
         });

power_grid_model_c/power_grid_model/include/power_grid_model/main_model_impl.hpp

@@ -186,6 +186,18 @@ class MainModelImpl<ExtraRetrievableTypes<ExtraRetrievableType...>, ComponentLis
         return result;
     }
 
+    // helper function to get the number of components per type
+    std::array<bool, n_types> get_n_components_per_type() const {
+        std::array<bool, n_types> result{};
+        size_t idx{};
+        main_core::utils::run_functor_with_all_types_return_void<ComponentType...>(
+            [&result, this, &idx]<typename CompType>() {
+                result[idx] = this->component_count<CompType>();
+                ++idx;
+            });
+        return result;
+    }
+
     // helper function to add vectors of components
     template <class CompType> void add_component(std::vector<typename CompType::InputType> const& components) {
         add_component<CompType>(components.begin(), components.end());
@@ -580,10 +592,9 @@ class MainModelImpl<ExtraRetrievableTypes<ExtraRetrievableType...>, ComponentLis
 
         // cache component update order where possible.
         // the order for a cacheable (independent) component by definition is the same across all scenarios
-        // TODO: (figueroa1395): don't use string lookup, it is slow
-        std::map<std::string, Idx, std::less<>> const relevant_component_count_map = all_component_count();
+        auto const relevant_component_count = get_n_components_per_type();
         auto const is_independent =
-            main_core::is_update_independent<ComponentType...>(update_data, relevant_component_count_map);
+            main_core::is_update_independent<ComponentType...>(update_data, relevant_component_count);
         all_scenarios_sequence = get_sequence_idx_map(update_data, 0, is_independent);
 
         return [&base_model, &exceptions, &infos, &calculation_fn, &result_data, &update_data,