diff --git a/include/flecs.h b/include/flecs.h
index 9ebf225a9..0038a2d17 100644
--- a/include/flecs.h
+++ b/include/flecs.h
@@ -432,6 +432,16 @@ typedef struct ecs_type_hooks_t ecs_type_hooks_t;
  * alignment and type hooks. */
 typedef struct ecs_type_info_t ecs_type_info_t;
 
+/** Cached Type information.
+ * Contains information about a component type, such as its id, size and alignment */
+typedef struct ecs_cached_component_info_t ecs_cached_component_info_t;
+
+/** An index to a cached component id information.
+ * Can be used to map a typed component from object-oriented language
+ * fast to a dynamically-per-world generated component id.
+ * Components are resolved by name lookup and subsequently cached. */
+typedef int32_t ecs_component_cache_index_t;
+
 /** Information about an entity, like its table and row. */
 typedef struct ecs_record_t ecs_record_t;
 
@@ -864,6 +874,16 @@ struct ecs_type_info_t {
     const char *name;        /**< Type name. */
 };
 
+/** Type that contains cache component information
+ *
+ * \ingroup components
+ */
+struct ecs_cached_component_info_t {
+    ecs_entity_t component;  /**< Handle to component */
+    ecs_size_t size;         /**< Size of type */
+    ecs_size_t alignment;    /**< Alignment of type */
+};
+
 #include "flecs/private/api_types.h"        /* Supporting API types */
 #include "flecs/private/api_support.h"      /* Supporting API functions */
 #include "flecs/private/vec.h"              /* Vector */
@@ -3690,6 +3710,38 @@ const ecs_type_hooks_t* ecs_get_hooks_id(
     ecs_world_t *world,
     ecs_entity_t id);
 
+/** Get the cached information for a specific component cache index.
+ *
+ * @param world The world.
+ * @param component_cache_index The component cache index to lookup.
+ * @return The cached component info for the specific component, always returns a present entry.
+ */
+FLECS_API
+ecs_cached_component_info_t* ecs_get_or_create_cached_component_info(
+    ecs_world_t* world,
+    ecs_component_cache_index_t component_cache_index);
+
+/** Get the valid cached information for a specific component cache index.
+ *
+ * @param world The world.
+ * @param component_cache_index The component cache index to lookup.
+ * @return The valid cached component info for the specific component or NULL if invalid.
+ */
+FLECS_API
+const ecs_cached_component_info_t* ecs_lookup_cached_component_info(
+    const ecs_world_t* world,
+    ecs_component_cache_index_t component_cache_index);
+
+
+/** Test if the cached component info is valid (set)
+ *
+ * @param component_info The component cache index to lookup.
+ * @return True if the info is valid.
+ */
+FLECS_API
+bool ecs_is_cached_component_info_valid(
+    const ecs_cached_component_info_t* component_info);
+
 /** @} */
 
 /**
diff --git a/include/flecs/addons/cpp/component.hpp b/include/flecs/addons/cpp/component.hpp
index 2cec47ed1..30f1423b5 100644
--- a/include/flecs/addons/cpp/component.hpp
+++ b/include/flecs/addons/cpp/component.hpp
@@ -125,61 +125,20 @@ void register_lifecycle_actions(
 // will register it as a component, and verify whether the input is consistent.
 template <typename T>
 struct cpp_type_impl {
-    // Initialize component identifier
-    static void init(
-        entity_t entity, 
-        bool allow_tag = true) 
-    {
-        if (s_reset_count != ecs_cpp_reset_count_get()) {
-            reset();
-        }
-
-        // If an identifier was already set, check for consistency
-        if (s_id) {
-            ecs_assert(s_id == entity, ECS_INCONSISTENT_COMPONENT_ID, 
-                type_name<T>());
-            ecs_assert(allow_tag == s_allow_tag, ECS_INVALID_PARAMETER, NULL);
-
-            // Component was already registered and data is consistent with new
-            // identifier, so nothing else to be done.
-            return;
-        }
-
-        // Component wasn't registered yet, set the values. Register component
-        // name as the fully qualified flecs path.
-        s_id = entity;
-        s_allow_tag = allow_tag;
-        s_size = sizeof(T);
-        s_alignment = alignof(T);
-        if (is_empty<T>::value && allow_tag) {
-            s_size = 0;
-            s_alignment = 0;
-        }
-
-        s_reset_count = ecs_cpp_reset_count_get();
-    }
-
     // Obtain a component identifier for explicit component registration.
-    static entity_t id_explicit(world_t *world = nullptr, 
+    static entity_t id_explicit(world_t *world,
         const char *name = nullptr, bool allow_tag = true, flecs::id_t id = 0,
         bool is_component = true, bool *existing = nullptr)
     {
-        if (!s_id) {
-            // If no world was provided the component cannot be registered
-            ecs_assert(world != nullptr, ECS_COMPONENT_NOT_REGISTERED, name);
-        } else {
-            ecs_assert(!id || s_id == id, ECS_INCONSISTENT_COMPONENT_ID, NULL);
-        }
-
-        // If no id has been registered yet for the component (indicating the 
-        // component has not yet been registered, or the component is used
-        // across more than one binary), or if the id does not exists in the 
-        // world (indicating a multi-world application), register it. */
-        if (!s_id || (world && !ecs_exists(world, s_id))) {
-            init(s_id ? s_id : id, allow_tag);
-
-            ecs_assert(!id || s_id == id, ECS_INTERNAL_ERROR, NULL);
+        ecs_assert(world != nullptr, ECS_INTERNAL_ERROR, name);
 
+        if (const ecs_cached_component_info_t* info = ecs_lookup_cached_component_info(world, index)) {
+            return info->component;
+        } else {
+            // If no id has been registered yet for the component (indicating the
+            // component has not yet been registered), or if the id does not
+            // exists in the world (indicating a multi-world application),
+            // register it. */
             const char *symbol = nullptr;
             if (id) {
                 symbol = ecs_get_symbol(world, id);
@@ -188,23 +147,37 @@ struct cpp_type_impl {
                 symbol = symbol_name<T>();
             }
 
-            entity_t entity = ecs_cpp_component_register_explicit(
-                    world, s_id, id, name, type_name<T>(), symbol, 
-                        s_size, s_alignment, is_component, existing);
+            const bool is_tag = is_empty<T>::value && allow_tag;
+
+            const size_t component_size = is_tag ? 0U : size();
+            const size_t component_alignment = is_tag ? 0U : alignment();
+
+            const entity_t entity = ecs_cpp_component_register_explicit(
+                world, id, name, type_name<T>(), symbol,
+                component_size, component_alignment, is_component, existing);
+
+            // Component wasn't registered yet, set the values. Register component
+            // name as the fully qualified flecs path.
+            ecs_cached_component_info_t* inserted =
+                ecs_get_or_create_cached_component_info(world, index);
 
-            s_id = entity;
+            ecs_assert(!!inserted, ECS_INTERNAL_ERROR, NULL);
+            ecs_assert(!ecs_is_cached_component_info_valid(inserted), ECS_INTERNAL_ERROR,
+                NULL);
+
+            inserted->component = entity;
+            inserted->size = static_cast<ecs_size_t>(component_size);
+            inserted->alignment = static_cast<ecs_size_t>(component_alignment);
+
+            ecs_assert(ecs_is_cached_component_info_valid(inserted), ECS_INTERNAL_ERROR, NULL);
 
             // If component is enum type, register constants
             #if FLECS_CPP_ENUM_REFLECTION_SUPPORT            
             _::init_enum<T>(world, entity);
             #endif
-        }
 
-        // By now the identifier must be valid and known with the world.
-        ecs_assert(s_id != 0 && ecs_exists(world, s_id), 
-            ECS_INTERNAL_ERROR, NULL);
-
-        return s_id;
+            return entity;
+        }
     }
 
     // Obtain a component identifier for implicit component registration. This
@@ -213,29 +186,28 @@ struct cpp_type_impl {
     // Additionally, implicit registration temporarily resets the scope & with
     // state of the world, so that the component is not implicitly created with
     // the scope/with of the code it happens to be first used by.
-    static id_t id(world_t *world = nullptr, const char *name = nullptr, 
+    static id_t id(world_t *world, const char *name = nullptr,
         bool allow_tag = true)
     {
-        // If no id has been registered yet, do it now.
-        if (!registered(world)) {
-            ecs_entity_t prev_scope = 0;
-            ecs_id_t prev_with = 0;
-
-            if (world) {
-                prev_scope = ecs_set_scope(world, 0);
-                prev_with = ecs_set_with(world, 0);
-            }
+        ecs_assert(world != nullptr, ECS_INTERNAL_ERROR, name);
+
+        if (const ecs_cached_component_info_t* info = ecs_lookup_cached_component_info(world, index)) {
+            return info->component;
+        } else {
+            // If no id has been registered yet, do it now.
+            const ecs_entity_t prev_scope = ecs_set_scope(world, 0);
+            const ecs_id_t prev_with = ecs_set_with(world, 0);
 
             // This will register a component id, but will not register 
             // lifecycle callbacks.
             bool existing;
-            id_explicit(world, name, allow_tag, 0, true, &existing);
+            const entity_t id = id_explicit(world, name, allow_tag, 0, true, &existing);
 
             // Register lifecycle callbacks, but only if the component has a
             // size. Components that don't have a size are tags, and tags don't
             // require construction/destruction/copy/move's. */
             if (size() && !existing) {
-                register_lifecycle_actions<T>(world, s_id);
+                register_lifecycle_actions<T>(world, id);
             }
             
             if (prev_with) {
@@ -244,62 +216,41 @@ struct cpp_type_impl {
             if (prev_scope) {
                 ecs_set_scope(world, prev_scope);
             }
-        }
-
-        // By now we should have a valid identifier
-        ecs_assert(s_id != 0, ECS_INTERNAL_ERROR, NULL);
 
-        return s_id;
+            return id;
+        }
     }
 
-    // Return the size of a component.
-    static size_t size() {
-        ecs_assert(s_id != 0, ECS_INTERNAL_ERROR, NULL);
-        return s_size;
+    /// Looks the assigned component up in the provided world.
+    /// It can happen that the component has not been initialized yet.
+    static entity_t lookup(const world_t* world) {
+        const ecs_cached_component_info_t* info = ecs_lookup_cached_component_info(world, index);
+        return info ? info->component : 0;
     }
 
-    // Return the alignment of a component.
-    static size_t alignment() {
-        ecs_assert(s_id != 0, ECS_INTERNAL_ERROR, NULL);
-        return s_alignment;
+    // Was the component already registered.
+    static bool registered(const world_t* world) {
+        return !!lookup(world);
     }
 
-    // Was the component already registered.
-    static bool registered(flecs::world_t *world) {
-        if (s_reset_count != ecs_cpp_reset_count_get()) {
-            reset();
-        }
-        if (s_id == 0) {
-            return false;
-        }
-        if (world && !ecs_exists(world, s_id)) {
-            return false;
-        }
-        return true;
+    // Return the size of this component.
+    static size_t size() {
+        return sizeof(T);
     }
 
-    // This function is only used to test cross-translation unit features. No
-    // code other than test cases should invoke this function.
-    static void reset() {
-        s_id = 0;
-        s_size = 0;
-        s_alignment = 0;
-        s_allow_tag = true;
+    // Return the alignment of this component.
+    static size_t alignment() {
+        return alignof(T);
     }
 
-    static entity_t s_id;
-    static size_t s_size;
-    static size_t s_alignment;
-    static bool s_allow_tag;
-    static int32_t s_reset_count;
+    // Acquire a per instance incremental index for a world-local component id cache.
+    static ecs_component_cache_index_t index;
 };
 
 // Global templated variables that hold component identifier and other info
-template <typename T> entity_t      cpp_type_impl<T>::s_id;
-template <typename T> size_t        cpp_type_impl<T>::s_size;
-template <typename T> size_t        cpp_type_impl<T>::s_alignment;
-template <typename T> bool          cpp_type_impl<T>::s_allow_tag( true );
-template <typename T> int32_t       cpp_type_impl<T>::s_reset_count;
+template <typename T>
+ecs_component_cache_index_t cpp_type_impl<T>::index{
+    ecs_cpp_component_id_storage_add()};
 
 // Front facing class for implicitly registering a component & obtaining 
 // static component data
@@ -375,10 +326,9 @@ struct component : untyped_component {
             implicit_name = true;
         }
 
-        if (_::cpp_type<T>::registered(world)) {
-            /* Obtain component id. Because the component is already registered,
-             * this operation does nothing besides returning the existing id */
-            id = _::cpp_type<T>::id_explicit(world, name, allow_tag, id);
+        /* Obtain a registered component id. */
+        if (const entity_t registered = _::cpp_type<T>::lookup(world)) {
+            id = registered;
 
             ecs_cpp_component_validate(world, id, n, _::symbol_name<T>(),
                 _::cpp_type<T>::size(),
@@ -504,17 +454,6 @@ struct component : untyped_component {
     }
 };
 
-/** Get id currently assigned to component. If no world has registered the
- * component yet, this operation will return 0. */
-template <typename T>
-flecs::entity_t type_id() {
-    if (_::cpp_type<T>::s_reset_count == ecs_cpp_reset_count_get()) {
-        return _::cpp_type<T>::s_id;
-    } else {
-        return 0;
-    }
-}
-
 /** Reset static component ids.
  * When components are registered their component ids are stored in a static
  * type specific variable. This stored id is passed into component registration
@@ -537,9 +476,9 @@ flecs::entity_t type_id() {
  * 
  * \ingroup cpp_components
  */
-inline void reset() {
-    ecs_cpp_reset_count_inc();
-}
+ECS_DEPRECATED("reset was deprecated, world-local component ids "
+               "are supported by default now.")
+inline void reset() {}
 
 }
 
diff --git a/include/flecs/addons/cpp/mixins/entity/builder.hpp b/include/flecs/addons/cpp/mixins/entity/builder.hpp
index 31963b563..02f7f8872 100644
--- a/include/flecs/addons/cpp/mixins/entity/builder.hpp
+++ b/include/flecs/addons/cpp/mixins/entity/builder.hpp
@@ -566,7 +566,7 @@ struct entity_builder : entity_view {
      */   
     template<typename T>
     Self& enable() {
-        return this->enable(_::cpp_type<T>::id());
+        return this->enable(_::cpp_type<T>::id(this->m_world));
     }
 
     /** Enable a pair.
@@ -587,7 +587,7 @@ struct entity_builder : entity_view {
      */   
     template<typename First>
     Self& enable(flecs::id_t second) {
-        return this->enable(_::cpp_type<First>::id(), second);
+        return this->enable(_::cpp_type<First>::id(this->m_world), second);
     }
 
     /** Enable a pair.
@@ -598,7 +598,7 @@ struct entity_builder : entity_view {
      */   
     template<typename First, typename Second>
     Self& enable() {
-        return this->enable<First>(_::cpp_type<Second>::id());
+        return this->template enable<First>(_::cpp_type<Second>::id(this->m_world));
     }
 
     /** Disable an id.
@@ -618,7 +618,7 @@ struct entity_builder : entity_view {
      */   
     template<typename T>
     Self& disable() {
-        return this->disable(_::cpp_type<T>::id());
+        return this->disable(_::cpp_type<T>::id(this->m_world));
     }
 
     /** Disable a pair.
@@ -639,7 +639,7 @@ struct entity_builder : entity_view {
      */   
     template<typename First>
     Self& disable(flecs::id_t second) {
-        return this->disable(_::cpp_type<First>::id(), second);
+        return this->disable(_::cpp_type<First>::id(this->m_world), second);
     }
 
     /** Disable a pair.
@@ -650,7 +650,7 @@ struct entity_builder : entity_view {
      */   
     template<typename First, typename Second>
     Self& disable() {
-        return this->disable<First>(_::cpp_type<Second>::id());
+        return this->disable<First>(_::cpp_type<Second>::id(this->m_world));
     }
 
     Self& set_ptr(entity_t comp, size_t size, const void *ptr) {
diff --git a/include/flecs/addons/cpp/mixins/filter/impl.hpp b/include/flecs/addons/cpp/mixins/filter/impl.hpp
index 1b768710c..32909555d 100644
--- a/include/flecs/addons/cpp/mixins/filter/impl.hpp
+++ b/include/flecs/addons/cpp/mixins/filter/impl.hpp
@@ -240,7 +240,7 @@ inline void world::each(Func&& func) const {
 template <typename T, typename Func>
 inline void world::each(Func&& func) const {
     ecs_term_t t = {};
-    t.id = _::cpp_type<T>::id();
+    t.id = _::cpp_type<T>::id(this->m_world);
     ecs_iter_t it = ecs_term_iter(m_world, &t);
 
     while (ecs_term_next(&it)) {
diff --git a/include/flecs/addons/cpp/mixins/meta/impl.hpp b/include/flecs/addons/cpp/mixins/meta/impl.hpp
index 31cb53395..f70dc8086 100644
--- a/include/flecs/addons/cpp/mixins/meta/impl.hpp
+++ b/include/flecs/addons/cpp/mixins/meta/impl.hpp
@@ -64,18 +64,20 @@ inline void init(flecs::world& world) {
     // specific types.
 
     if (!flecs::is_same<i32_t, iptr_t>() && !flecs::is_same<i64_t, iptr_t>()) {
-        flecs::_::cpp_type<iptr_t>::init(flecs::Iptr, true);
-        ecs_assert(flecs::type_id<iptr_t>() == flecs::Iptr, 
-            ECS_INTERNAL_ERROR, NULL);
+        const entity_t id = flecs::_::cpp_type<iptr_t>::id_explicit(world, nullptr, flecs::Iptr, true);
+        (void)id;
+
+        ecs_assert(id == flecs::Iptr, ECS_INTERNAL_ERROR, NULL);
         // Remove symbol to prevent validation errors, as it doesn't match with 
         // the typename
         ecs_remove_pair(world, flecs::Iptr, ecs_id(EcsIdentifier), EcsSymbol);
     }
 
     if (!flecs::is_same<u32_t, uptr_t>() && !flecs::is_same<u64_t, uptr_t>()) {
-        flecs::_::cpp_type<uptr_t>::init(flecs::Uptr, true);
-        ecs_assert(flecs::type_id<uptr_t>() == flecs::Uptr, 
-            ECS_INTERNAL_ERROR, NULL);
+        const entity_t id = flecs::_::cpp_type<uptr_t>::id_explicit(world, nullptr, flecs::Uptr, true);
+        (void)id;
+
+        ecs_assert(id == flecs::Uptr, ECS_INTERNAL_ERROR, NULL);
         // Remove symbol to prevent validation errors, as it doesn't match with 
         // the typename
         ecs_remove_pair(world, flecs::Uptr, ecs_id(EcsIdentifier), EcsSymbol);
diff --git a/include/flecs/addons/cpp/mixins/module/impl.hpp b/include/flecs/addons/cpp/mixins/module/impl.hpp
index d99c2e7d2..ca22d280c 100644
--- a/include/flecs/addons/cpp/mixins/module/impl.hpp
+++ b/include/flecs/addons/cpp/mixins/module/impl.hpp
@@ -43,12 +43,8 @@ flecs::entity import(world& world) {
     
     if (!_::cpp_type<T>::registered(world)) {
 
-        /* Module is registered with world, initialize static data */
-        if (m) {
-            _::cpp_type<T>::init(m, false);
-        
         /* Module is not yet registered, register it now */
-        } else {
+        if (!m) {
             m = _::do_import<T>(world, symbol);
         }
 
diff --git a/include/flecs/addons/flecs_cpp.h b/include/flecs/addons/flecs_cpp.h
index 2ee2642f7..e29c1eb64 100644
--- a/include/flecs/addons/flecs_cpp.h
+++ b/include/flecs/addons/flecs_cpp.h
@@ -89,7 +89,6 @@ ecs_entity_t ecs_cpp_component_register(
 FLECS_API
 ecs_entity_t ecs_cpp_component_register_explicit(
     ecs_world_t *world,
-    ecs_entity_t s_id,
     ecs_entity_t id,
     const char *name,
     const char *type_name,
@@ -112,11 +111,18 @@ ecs_entity_t ecs_cpp_enum_constant_register(
     const char *name,
     int value);
 
-FLECS_API 
-int32_t ecs_cpp_reset_count_get(void);
+ECS_DEPRECATED(
+    "ecs_cpp_reset_count_get was deprecated, world-local component ids "
+    "are supported by default now.")
+FLECS_API int32_t ecs_cpp_reset_count_get(void);
+
+ECS_DEPRECATED(
+    "ecs_cpp_reset_count_inc was deprecated, world-local component ids "
+    "are supported by default now.")
+FLECS_API int32_t ecs_cpp_reset_count_inc(void);
 
 FLECS_API
-int32_t ecs_cpp_reset_count_inc(void);
+ecs_size_t ecs_cpp_component_id_storage_add(void);
 
 #ifdef FLECS_META
 FLECS_API
diff --git a/src/addons/flecs_cpp.c b/src/addons/flecs_cpp.c
index c62b7bb5e..2fccff0bd 100644
--- a/src/addons/flecs_cpp.c
+++ b/src/addons/flecs_cpp.c
@@ -347,7 +347,6 @@ ecs_entity_t ecs_cpp_component_register(
 
 ecs_entity_t ecs_cpp_component_register_explicit(
     ecs_world_t *world,
-    ecs_entity_t s_id,
     ecs_entity_t id,
     const char *name,
     const char *type_name,
@@ -388,7 +387,7 @@ ecs_entity_t ecs_cpp_component_register_explicit(
     ecs_entity_t entity;
     if (is_component || size != 0) {
         entity = ecs_entity(world, {
-            .id = s_id,
+            .id = 0,
             .name = name,
             .sep = "::",
             .root_sep = "::",
@@ -405,7 +404,7 @@ ecs_entity_t ecs_cpp_component_register_explicit(
         ecs_assert(entity != 0, ECS_INVALID_OPERATION, NULL);
     } else {
         entity = ecs_entity(world, {
-            .id = s_id,
+            .id = 0,
             .name = name,
             .sep = "::",
             .root_sep = "::",
@@ -415,7 +414,6 @@ ecs_entity_t ecs_cpp_component_register_explicit(
     }
 
     ecs_assert(entity != 0, ECS_INTERNAL_ERROR, NULL);
-    ecs_assert(!s_id || s_id == entity, ECS_INTERNAL_ERROR, NULL);
     ecs_os_free(existing_name);
 
     return entity;
@@ -482,14 +480,18 @@ ecs_entity_t ecs_cpp_enum_constant_register(
     return id;
 }
 
-static int32_t flecs_reset_count = 0;
-
 int32_t ecs_cpp_reset_count_get(void) {
-    return flecs_reset_count;
+    return 0; // Deprecated
 }
 
 int32_t ecs_cpp_reset_count_inc(void) {
-    return ++flecs_reset_count;
+    return 0; // Deprecated
+}
+
+static ecs_size_t flecs_component_storage_count = 0;
+
+ecs_size_t ecs_cpp_component_id_storage_add(void) {
+    return flecs_component_storage_count++;
 }
 
 #ifdef FLECS_META
diff --git a/src/private_types.h b/src/private_types.h
index cd55322db..fe4cb0516 100644
--- a/src/private_types.h
+++ b/src/private_types.h
@@ -545,6 +545,9 @@ struct ecs_world_t {
     ecs_ctx_free_t binding_ctx_free; /**< Callback to free binding_ctx */
 
     ecs_vec_t fini_actions;          /* Callbacks to execute when world exits */
+
+    /* -- Caches -- */
+    ecs_vec_t component_id_cache;    /* World local component id cache */
 };
 
 #endif
diff --git a/src/world.c b/src/world.c
index 9a3751e4a..0b3a61cdc 100644
--- a/src/world.c
+++ b/src/world.c
@@ -893,6 +893,8 @@ ecs_world_t *ecs_mini(void) {
     flecs_sparse_init_t(world->pending_buffer, a,
         &world->allocators.sparse_chunk, ecs_table_t*);
 
+    ecs_vec_init_t(a, &world->component_id_cache, ecs_cached_component_info_t, 0);
+
     flecs_name_index_init(&world->aliases, a);
     flecs_name_index_init(&world->symbols, a);
     ecs_vec_init_t(a, &world->fini_actions, ecs_action_elem_t, 0);
@@ -1240,6 +1242,57 @@ const ecs_type_hooks_t* ecs_get_hooks_id(
     return NULL;
 }
 
+ecs_cached_component_info_t* ecs_get_or_create_cached_component_info(
+    ecs_world_t* world,
+    ecs_component_cache_index_t component_cache_index) {
+
+    ecs_poly_assert(world, ecs_world_t);
+
+    const int32_t old_count = ecs_vec_count(&world->component_id_cache);
+    if (component_cache_index >= old_count) {
+        const int32_t new_count = component_cache_index + 1;
+
+        ecs_vec_set_count_t(&world->allocator, &world->component_id_cache,
+                            ecs_cached_component_info_t, new_count);
+
+        ecs_cached_component_info_t *added =
+            ecs_vec_get_t(&world->component_id_cache,
+                          ecs_cached_component_info_t, old_count);
+
+        /* Array may have holes, so initialize with 0 */
+        ecs_os_memset_n(added, 0, ecs_cached_component_info_t,
+                        new_count - old_count);
+    }
+
+    return ecs_vec_get_t(&world->component_id_cache,
+                         ecs_cached_component_info_t, component_cache_index);
+}
+
+const ecs_cached_component_info_t* ecs_lookup_cached_component_info(
+    const ecs_world_t* world,
+    ecs_component_cache_index_t component_cache_index) {
+
+    ecs_poly_assert(world, ecs_world_t);
+
+    if (component_cache_index >= ecs_vec_count(&world->component_id_cache)) {
+        return NULL;
+    }
+
+    const ecs_cached_component_info_t *info =
+        ecs_vec_get_t(&world->component_id_cache, ecs_cached_component_info_t,
+                      component_cache_index);
+
+    if (!ecs_is_cached_component_info_valid(info)) {
+        return NULL;
+    }
+
+    return info;
+}
+
+bool ecs_is_cached_component_info_valid(const ecs_cached_component_info_t* component_info) {
+    return component_info->component != 0;
+}
+
 void ecs_atfini(
     ecs_world_t *world,
     ecs_fini_action_t action,
@@ -1398,10 +1451,12 @@ int ecs_fini(
     }
 
     /* After this point no more user code is invoked */
+    ecs_allocator_t* a = &world->allocator;
 
     ecs_dbg_1("#[bold]cleanup world datastructures");
     ecs_log_push_1();
     flecs_entities_fini(world);
+    ecs_vec_fini_t(a, &world->component_id_cache, ecs_cached_component_info_t);
     flecs_sparse_fini(world->pending_tables);
     flecs_sparse_fini(world->pending_buffer);
     ecs_os_free(world->pending_tables);