Java: Improve performance of confusing overloading query.

java/ql/src/Violations of Best Practice/Naming Conventions/ConfusingOverloading.ql

@@ -50,6 +50,7 @@ private predicate whitelist(string name) { name = "visit" }
  * Method `m` has name `name`, number of parameters `numParams`
  * and is declared in `t` or inherited from a supertype of `t`.
  */
+pragma[nomagic]
 private predicate candidateMethod(RefType t, Method m, string name, int numParam) {
   exists(Method n | n.getSourceDeclaration() = m | t.inherits(n)) and
   m.getName() = name and