When performing JPA Criteria queries, there are many calls to ReflectHelper.getConstantValue with values like "generatedAlias0", which in turn attempts to load the class "generatedAlias0". This naturally fails, but resolving the class and throwing/cachting the exception is quite expensive in terms of cpu performance. No such calls should be made.

Thread [main] (Suspended (breakpoint at line 191 in ReflectHelper))
owns: QueryTranslatorImpl (id=8378)
ReflectHelper.classForName(String) line: 191
ReflectHelper.getConstantValue(String) line: 279
QueryTranslatorImpl$JavaConstantConverter.handleDotStructure(AST) line: 624
QueryTranslatorImpl$JavaConstantConverter.visit(AST) line: 619
NodeTraverser.visitDepthFirst(AST) line: 78
NodeTraverser.traverseDepthFirst(AST) line: 67
QueryTranslatorImpl.parse(boolean) line: 300
QueryTranslatorImpl.doCompile(Map, boolean, String) line: 203
QueryTranslatorImpl.compile(Map, boolean) line: 158
HQLQueryPlan.<init>(String, String, boolean, Map<String,Filter>, SessionFactoryImplementor, EntityGraphQueryHint) line: 131
HQLQueryPlan.<init>(String, boolean, Map<String,Filter>, SessionFactoryImplementor) line: 93
QueryPlanCache.getHQLQueryPlan(String, boolean, Map<String,Filter>) line: 167
SessionImpl(AbstractSessionImpl).getHQLQueryPlan(String, boolean) line: 301
SessionImpl(AbstractSessionImpl).createQuery(String) line: 236
SessionImpl.createQuery(String) line: 1800
EntityManagerImpl(AbstractEntityManagerImpl).createQuery(String, Class<T>, Selection, QueryOptions) line: 568
CriteriaQueryImpl$1.buildCompiledQuery(HibernateEntityManagerImplementor, InterpretedParameterMetadata) line: 336
CriteriaCompiler.compile(CompilableCriteria) line: 147
EntityManagerImpl(AbstractEntityManagerImpl).createQuery(CriteriaQuery<T>) line: 736