diff --git a/include/engine/datafacade/algorithm_datafacade.hpp b/include/engine/datafacade/algorithm_datafacade.hpp
index 004f33341..ac7de6916 100644
--- a/include/engine/datafacade/algorithm_datafacade.hpp
+++ b/include/engine/datafacade/algorithm_datafacade.hpp
@@ -57,8 +57,6 @@ template <> class AlgorithmDataFacade<algorithm::CoreCH>
     using EdgeData = contractor::QueryEdge::EdgeData;
 
     virtual bool IsCoreNode(const NodeID id) const = 0;
-
-    virtual std::size_t GetCoreSize() const = 0;
 };
 }
 }
diff --git a/include/engine/datafacade/contiguous_internalmem_datafacade.hpp b/include/engine/datafacade/contiguous_internalmem_datafacade.hpp
index 34f22490b..0f53bfb93 100644
--- a/include/engine/datafacade/contiguous_internalmem_datafacade.hpp
+++ b/include/engine/datafacade/contiguous_internalmem_datafacade.hpp
@@ -175,15 +175,9 @@ class ContiguousInternalMemoryAlgorithmDataFacade<algorithm::CoreCH>
 
     bool IsCoreNode(const NodeID id) const override final
     {
-        if (m_is_core_node.size() > 0)
-        {
-            return m_is_core_node.at(id);
-        }
-
-        return false;
+        BOOST_ASSERT(id < m_is_core_node.size());
+        return m_is_core_node[id];
     }
-
-    std::size_t GetCoreSize() const override final { return m_is_core_node.size(); }
 };
 
 /**
diff --git a/unit_tests/mocks/mock_datafacade.hpp b/unit_tests/mocks/mock_datafacade.hpp
index 0ef54270f..1d490b70e 100644
--- a/unit_tests/mocks/mock_datafacade.hpp
+++ b/unit_tests/mocks/mock_datafacade.hpp
@@ -289,7 +289,6 @@ class MockAlgorithmDataFacade<engine::algorithm::CoreCH>
 
   public:
     bool IsCoreNode(const NodeID /* id */) const override { return false; }
-    std::size_t GetCoreSize() const override { return 0; }
 };
 
 template <typename AlgorithmT>