fix(performance): Rewrite CtExecutableReference#isOverriding.

Closes #586

src/main/java/spoon/support/reflect/reference/CtExecutableReferenceImpl.java

@@ -223,16 +223,18 @@ public <S extends T> CtExecutableReference<S> getOverridingExecutable(
 
 	@Override
 	public boolean isOverriding(CtExecutableReference<?> executable) {
+		final boolean isSame = getSimpleName().equals(executable.getSimpleName()) && getParameters().equals(executable.getParameters()) && getActualTypeArguments().equals(executable.getActualTypeArguments());
+		if (!isSame) {
+			return false;
+		}
 		if (getDeclaringType().isAnonymous()) {
 			if (!getDeclaringType().getDeclaringType().isSubtypeOf(executable.getDeclaringType())) {
 				return false;
 			}
 		} else if (!getDeclaringType().isSubtypeOf(executable.getDeclaringType())) {
 			return false;
 		}
-		return getSimpleName().equals(executable.getSimpleName())
-				&& getParameters().equals(executable.getParameters())
-				&& getActualTypeArguments().equals(executable.getActualTypeArguments());
+		return true;
 	}
 
 	@Override

src/test/java/spoon/test/executable/ExecutableRefTest.java

@@ -11,9 +11,14 @@
 import spoon.reflect.code.CtStatement;
 import spoon.reflect.declaration.CtClass;
 import spoon.reflect.declaration.CtMethod;
+import spoon.reflect.declaration.CtType;
 import spoon.reflect.factory.Factory;
 import spoon.reflect.reference.CtExecutableReference;
+import spoon.reflect.visitor.Query;
+import spoon.reflect.visitor.filter.InvocationFilter;
 import spoon.reflect.visitor.filter.TypeFilter;
+import spoon.test.executable.testclasses.Pozole;
+import spoon.testing.utils.ModelUtils;
 
 import java.lang.reflect.Constructor;
 import java.lang.reflect.Method;
@@ -107,4 +112,14 @@ private CtAbstractInvocation<?> getInvocationFromMethod(String methodName) throw
 
 		return (CtAbstractInvocation<?>) ctStatement;
 	}
+
+	@Test
+	public void testOverridingMethod() throws Exception {
+		final CtType<Pozole> aPozole = ModelUtils.buildClass(Pozole.class);
+		final CtExecutableReference<?> run = aPozole.getMethodsByName("run").get(0).getReference();
+
+		final List<CtInvocation<?>> elements = Query.getElements(run.getFactory(), new InvocationFilter(run));
+		assertEquals(1, elements.size());
+		assertEquals(run, elements.get(0).getExecutable());
+	}
 }

src/test/java/spoon/test/executable/testclasses/Pozole.java

@@ -0,0 +1,12 @@
+package spoon.test.executable.testclasses;
+
+public class Pozole implements Runnable {
+	public void cook() {
+		run();
+	}
+
+	@Override
+	public void run() {
+
+	}
+}