diff --git a/org.fortiss.tooling.ext.reuse/src/org/fortiss/tooling/ext/reuse/.ratings b/org.fortiss.tooling.ext.reuse/src/org/fortiss/tooling/ext/reuse/.ratings
index 691c1eb7178982b991e71ef260cad623ffb86cfb..da06f1f9f005d0cc2c68437bb55349018a7e3c0b 100644
--- a/org.fortiss.tooling.ext.reuse/src/org/fortiss/tooling/ext/reuse/.ratings
+++ b/org.fortiss.tooling.ext.reuse/src/org/fortiss/tooling/ext/reuse/.ratings
@@ -1 +1 @@
-ToolingReuseActivator.java 52b9208684334f60ee8c0bc074c86f06f6248227 YELLOW
+ToolingReuseActivator.java 52b9208684334f60ee8c0bc074c86f06f6248227 GREEN
diff --git a/org.fortiss.tooling.kernel/src/org/fortiss/tooling/kernel/internal/.ratings b/org.fortiss.tooling.kernel/src/org/fortiss/tooling/kernel/internal/.ratings
index 04e9ad025e7633a470f70e3b253bfe0f67a4f20d..6af5a88448fa802e2b68399aa9a0c390c9b28e3c 100644
--- a/org.fortiss.tooling.kernel/src/org/fortiss/tooling/kernel/internal/.ratings
+++ b/org.fortiss.tooling.kernel/src/org/fortiss/tooling/kernel/internal/.ratings
@@ -1,7 +1,7 @@
 CommandLineInterfaceService.java 6b5c94c52702f773c60b181eff52204ab379b248 GREEN
 CommandStackService.java 957bda69b5feb91f002aed4d25ed334e92801e7e GREEN
 ConnectionCompositorService.java 5a52f8a3e88c167ae6909c3d9eb3fb4706177e8b GREEN
-ConstraintCheckerService.java 4f6f11949433f8dc76c00c2eb6d56bf277378954 YELLOW
+ConstraintCheckerService.java 94f1c07c37520161065128d8faaab10ab0c041b0 RED
 DummyTopLevelElement.java 21807bbdafec2e0ef28f0ee9090218f90bd73aee GREEN
 ElementCompositorService.java b1924b5b349118a70149cfac5b48544897d26e9e GREEN
 LoggingService.java da784259f7b456b54bf75c41ec268f64919ce78d GREEN
diff --git a/org.fortiss.tooling.kernel/src/org/fortiss/tooling/kernel/internal/ConstraintCheckerService.java b/org.fortiss.tooling.kernel/src/org/fortiss/tooling/kernel/internal/ConstraintCheckerService.java
index 4f6f11949433f8dc76c00c2eb6d56bf277378954..94f1c07c37520161065128d8faaab10ab0c041b0 100644
--- a/org.fortiss.tooling.kernel/src/org/fortiss/tooling/kernel/internal/ConstraintCheckerService.java
+++ b/org.fortiss.tooling.kernel/src/org/fortiss/tooling/kernel/internal/ConstraintCheckerService.java
@@ -132,6 +132,9 @@ public class ConstraintCheckerService extends EObjectAwareServiceBase<IConstrain
 
 		// Skip constraint checks if the given element itself is excluded from checks or if it
 		// exists within an excluded element.
+		// TODO (TM): Looking through all parents for each excluded type introduces quite an
+		// overhead. As the list of parents is never used, memory and runtime overhead can be
+		// reduced by using `getFirstParentWithType` or, even better, `isAncestor` instead.
 		for(Class<? extends EObject> excludedClass : constraintCheckExclusionTypes) {
 			List<? extends EObject> foundExcludedParents =
 					getParentsWithType(modelElement, excludedClass);
diff --git a/org.fortiss.tooling.kernel/src/org/fortiss/tooling/kernel/service/.ratings b/org.fortiss.tooling.kernel/src/org/fortiss/tooling/kernel/service/.ratings
index 06a3d8d9be523bb8a64f559e59064f64319467f5..3697f4effdd95c8570df4d662566f770759e3143 100644
--- a/org.fortiss.tooling.kernel/src/org/fortiss/tooling/kernel/service/.ratings
+++ b/org.fortiss.tooling.kernel/src/org/fortiss/tooling/kernel/service/.ratings
@@ -1,7 +1,7 @@
 ICommandLineInterfaceService.java c3e3ba08b2a1b8125b43abd1c29b7dc0a0be2b80 GREEN
 ICommandStackService.java 678dcd1a6ab435ed0870fa2a9ec48ce47f25a187 GREEN
 IConnectionCompositorService.java 0cdf4568b2cd3e95ea195df90a84699eff36442b GREEN
-IConstraintCheckerService.java dc04965ac0265f77cb846f472d76620fb05a491a YELLOW
+IConstraintCheckerService.java dc04965ac0265f77cb846f472d76620fb05a491a GREEN
 IEclipseResourceStorageService.java b1155ca15cd9474d4d533d6cb2725e8a22040ec9 GREEN
 IElementCompositorService.java acd462ec15f3bcc247b544b46ceebee971fe1408 GREEN
 IKernelIntrospectionSystemService.java 7005c3acb4c6f978729d93279c595765e94e38eb GREEN