diff --git a/jerry-core/ecma/base/ecma-alloc.c b/jerry-core/ecma/base/ecma-alloc.c
index f60a7d0d6..6d5d8d9ba 100644
--- a/jerry-core/ecma/base/ecma-alloc.c
+++ b/jerry-core/ecma/base/ecma-alloc.c
@@ -51,7 +51,7 @@ JERRY_STATIC_ASSERT (sizeof (ecma_extended_object_t) - sizeof (ecma_object_t) <=
  *
  * @return pointer to allocated memory
  */
-ecma_number_t *
+extern inline ecma_number_t * JERRY_ATTR_ALWAYS_INLINE
 ecma_alloc_number (void)
 {
   return (ecma_number_t *) jmem_pools_alloc (sizeof (ecma_number_t));
@@ -60,7 +60,7 @@ ecma_alloc_number (void)
 /**
  * Dealloc memory from an ecma-number
  */
-void
+extern inline void JERRY_ATTR_ALWAYS_INLINE
 ecma_dealloc_number (ecma_number_t *number_p) /**< number to be freed */
 {
   jmem_pools_free ((uint8_t *) number_p, sizeof (ecma_number_t));
diff --git a/jerry-core/ecma/base/ecma-gc.c b/jerry-core/ecma/base/ecma-gc.c
index 584321b46..0c4003a55 100644
--- a/jerry-core/ecma/base/ecma-gc.c
+++ b/jerry-core/ecma/base/ecma-gc.c
@@ -127,8 +127,8 @@ ecma_init_gc_info (ecma_object_t *object_p) /**< object */
 /**
  * Increase reference counter of an object
  */
-void
-ecma_ref_object (ecma_object_t *object_p) /**< object */
+extern inline void JERRY_ATTR_ALWAYS_INLINE
+ecma_ref_object_inline (ecma_object_t *object_p) /**< object */
 {
   if (JERRY_LIKELY (object_p->type_flags_refs < ECMA_OBJECT_MAX_REF))
   {
@@ -138,6 +138,15 @@ ecma_ref_object (ecma_object_t *object_p) /**< object */
   {
     jerry_fatal (ERR_REF_COUNT_LIMIT);
   }
+} /* ecma_ref_object_inline */
+
+/**
+ * Increase reference counter of an object
+ */
+void
+ecma_ref_object (ecma_object_t *object_p) /**< object */
+{
+  ecma_ref_object_inline (object_p);
 } /* ecma_ref_object */
 
 /**
diff --git a/jerry-core/ecma/base/ecma-gc.h b/jerry-core/ecma/base/ecma-gc.h
index a10e023fb..c5a5f548d 100644
--- a/jerry-core/ecma/base/ecma-gc.h
+++ b/jerry-core/ecma/base/ecma-gc.h
@@ -28,6 +28,7 @@
 
 void ecma_init_gc_info (ecma_object_t *object_p);
 void ecma_ref_object (ecma_object_t *object_p);
+void ecma_ref_object_inline (ecma_object_t *object_p);
 void ecma_deref_object (ecma_object_t *object_p);
 void ecma_gc_free_properties (ecma_object_t *object_p);
 void ecma_gc_run (void);
diff --git a/jerry-core/ecma/base/ecma-helpers-string.c b/jerry-core/ecma/base/ecma-helpers-string.c
index 4d9f91346..0e3a35a4a 100644
--- a/jerry-core/ecma/base/ecma-helpers-string.c
+++ b/jerry-core/ecma/base/ecma-helpers-string.c
@@ -843,17 +843,13 @@ ecma_concat_ecma_strings (ecma_string_t *string1_p, /**< first ecma-string */
 } /* ecma_concat_ecma_strings */
 
 /**
- * Increase reference counter of ecma-string.
+ * Increase reference counter of non-direct ecma-string.
  */
-void
-ecma_ref_ecma_string (ecma_string_t *string_p) /**< string descriptor */
+extern inline void JERRY_ATTR_ALWAYS_INLINE
+ecma_ref_ecma_string_non_direct (ecma_string_t *string_p) /**< string descriptor */
 {
   JERRY_ASSERT (string_p != NULL);
-
-  if (ECMA_IS_DIRECT_STRING (string_p))
-  {
-    return;
-  }
+  JERRY_ASSERT (!ECMA_IS_DIRECT_STRING (string_p));
 
 #ifdef JERRY_NDEBUG
   if (ECMA_STRING_IS_STATIC (string_p))
@@ -873,14 +869,13 @@ ecma_ref_ecma_string (ecma_string_t *string_p) /**< string descriptor */
   {
     jerry_fatal (ERR_REF_COUNT_LIMIT);
   }
-} /* ecma_ref_ecma_string */
+} /* ecma_ref_ecma_string_non_direct */
 
 /**
- * Decrease reference counter and deallocate ecma-string
- * if the counter becomes zero.
+ * Increase reference counter of ecma-string.
  */
 void
-ecma_deref_ecma_string (ecma_string_t *string_p) /**< ecma-string */
+ecma_ref_ecma_string (ecma_string_t *string_p) /**< string descriptor */
 {
   JERRY_ASSERT (string_p != NULL);
 
@@ -889,6 +884,18 @@ ecma_deref_ecma_string (ecma_string_t *string_p) /**< ecma-string */
     return;
   }
 
+  ecma_ref_ecma_string_non_direct (string_p);
+} /* ecma_ref_ecma_string */
+
+/**
+ * Decrease reference counter and deallocate a non-direct ecma-string
+ * if the counter becomes zero.
+ */
+extern inline void JERRY_ATTR_ALWAYS_INLINE
+ecma_deref_ecma_string_non_direct (ecma_string_t *string_p) /**< ecma-string */
+{
+  JERRY_ASSERT (!ECMA_IS_DIRECT_STRING (string_p));
+
 #ifdef JERRY_NDEBUG
   if (ECMA_STRING_IS_STATIC (string_p))
   {
@@ -907,6 +914,23 @@ ecma_deref_ecma_string (ecma_string_t *string_p) /**< ecma-string */
   }
 
   ecma_destroy_ecma_string (string_p);
+} /* ecma_deref_ecma_string_non_direct */
+
+/**
+ * Decrease reference counter and deallocate ecma-string
+ * if the counter becomes zero.
+ */
+void
+ecma_deref_ecma_string (ecma_string_t *string_p) /**< ecma-string */
+{
+  JERRY_ASSERT (string_p != NULL);
+
+  if (ECMA_IS_DIRECT_STRING (string_p))
+  {
+    return;
+  }
+
+  ecma_deref_ecma_string_non_direct (string_p);
 } /* ecma_deref_ecma_string */
 
 /**
diff --git a/jerry-core/ecma/base/ecma-helpers-value.c b/jerry-core/ecma/base/ecma-helpers-value.c
index be8b440ce..59543640b 100644
--- a/jerry-core/ecma/base/ecma-helpers-value.c
+++ b/jerry-core/ecma/base/ecma-helpers-value.c
@@ -536,7 +536,7 @@ ecma_create_float_number (ecma_number_t ecma_number) /**< value of the float num
  *
  * @return ecma-value
  */
-ecma_value_t
+extern inline ecma_value_t JERRY_ATTR_ALWAYS_INLINE
 ecma_make_float_value (ecma_number_t *ecma_num_p) /**< pointer to the float number */
 {
   return ecma_pointer_to_ecma_value (ecma_num_p) | ECMA_TYPE_FLOAT;
@@ -899,21 +899,21 @@ ecma_copy_value (ecma_value_t value)  /**< value description */
     case ECMA_TYPE_FLOAT:
     {
       ecma_number_t *num_p = (ecma_number_t *) ecma_get_pointer_from_ecma_value (value);
+      ecma_number_t *new_num_p = ecma_alloc_number ();
 
-      return ecma_create_float_number (*num_p);
-    }
-    case ECMA_TYPE_STRING:
-    {
-      ecma_ref_ecma_string (ecma_get_string_from_value (value));
-      return value;
+      *new_num_p = *num_p;
+
+      return ecma_make_float_value (new_num_p);
     }
 #if JERRY_ESNEXT
     case ECMA_TYPE_SYMBOL:
+#endif /* JERRY_ESNEXT */
+    case ECMA_TYPE_STRING:
     {
-      ecma_ref_ecma_string (ecma_get_symbol_from_value (value));
+      ecma_string_t *string_p = (ecma_string_t *) ecma_get_pointer_from_ecma_value (value);
+      ecma_ref_ecma_string_non_direct (string_p);
       return value;
     }
-#endif /* JERRY_ESNEXT */
 #if JERRY_BUILTIN_BIGINT
     case ECMA_TYPE_BIGINT:
     {
@@ -926,7 +926,7 @@ ecma_copy_value (ecma_value_t value)  /**< value description */
 #endif /* JERRY_BUILTIN_BIGINT */
     case ECMA_TYPE_OBJECT:
     {
-      ecma_ref_object (ecma_get_object_from_value (value));
+      ecma_ref_object_inline (ecma_get_object_from_value (value));
       return value;
     }
     default:
@@ -1131,26 +1131,20 @@ ecma_free_value (ecma_value_t value) /**< value description */
       ecma_dealloc_number (number_p);
       break;
     }
-
-    case ECMA_TYPE_STRING:
-    {
-      ecma_string_t *string_p = ecma_get_string_from_value (value);
-      ecma_deref_ecma_string (string_p);
-      break;
-    }
 #if JERRY_ESNEXT
     case ECMA_TYPE_SYMBOL:
+#endif /* JERRY_ESNEXT */
+    case ECMA_TYPE_STRING:
     {
-      ecma_deref_ecma_string (ecma_get_symbol_from_value (value));
+      ecma_string_t *string_p = (ecma_string_t *) ecma_get_pointer_from_ecma_value (value);
+      ecma_deref_ecma_string_non_direct (string_p);
       break;
     }
-#endif /* JERRY_ESNEXT */
     case ECMA_TYPE_OBJECT:
     {
       ecma_deref_object (ecma_get_object_from_value (value));
       break;
     }
-
 #if JERRY_BUILTIN_BIGINT
     case ECMA_TYPE_BIGINT:
     {
@@ -1158,10 +1152,10 @@ ecma_free_value (ecma_value_t value) /**< value description */
       {
         ecma_deref_bigint (ecma_get_extended_primitive_from_value (value));
       }
+
       break;
     }
 #endif /* JERRY_BUILTIN_BIGINT */
-
     default:
     {
       JERRY_ASSERT (ecma_get_value_type_field (value) == ECMA_TYPE_DIRECT
diff --git a/jerry-core/ecma/base/ecma-helpers.h b/jerry-core/ecma/base/ecma-helpers.h
index 6aa97e445..214fecbd9 100644
--- a/jerry-core/ecma/base/ecma-helpers.h
+++ b/jerry-core/ecma/base/ecma-helpers.h
@@ -321,7 +321,9 @@ ecma_string_t *ecma_append_chars_to_string (ecma_string_t *string1_p,
                                             lit_utf8_size_t cesu8_string2_length);
 ecma_string_t *ecma_concat_ecma_strings (ecma_string_t *string1_p, ecma_string_t *string2_p);
 void ecma_ref_ecma_string (ecma_string_t *string_p);
+void ecma_ref_ecma_string_non_direct (ecma_string_t *string_p);
 void ecma_deref_ecma_string (ecma_string_t *string_p);
+void ecma_deref_ecma_string_non_direct (ecma_string_t *string_p);
 void ecma_destroy_ecma_string (ecma_string_t *string_p);
 ecma_number_t ecma_string_to_number (const ecma_string_t *str_p);
 uint32_t ecma_string_get_array_index (const ecma_string_t *str_p);