DefaultSingletonBeanRegistry avoids singletonObjects lock wherever possible for non-singleton factory performance

Issue: SPR-9819

spring-beans/src/main/java/org/springframework/beans/factory/support/DefaultSingletonBeanRegistry.java

@@ -166,7 +166,7 @@ public class DefaultSingletonBeanRegistry extends SimpleAliasRegistry implements
 	}
 
 	public Object getSingleton(String beanName) {
-		return getSingleton(beanName, true);
+		return getSingleton(beanName, isSingletonCurrentlyInCreation(beanName));
 	}
 
 	/**
@@ -179,10 +179,10 @@ public class DefaultSingletonBeanRegistry extends SimpleAliasRegistry implements
 	 */
 	protected Object getSingleton(String beanName, boolean allowEarlyReference) {
 		Object singletonObject = this.singletonObjects.get(beanName);
-		if (singletonObject == null) {
+		if (singletonObject == null && allowEarlyReference) {
 			synchronized (this.singletonObjects) {
 				singletonObject = this.earlySingletonObjects.get(beanName);
-				if (singletonObject == null && allowEarlyReference) {
+				if (singletonObject == null) {
 					ObjectFactory singletonFactory = this.singletonFactories.get(beanName);
 					if (singletonFactory != null) {
 						singletonObject = singletonFactory.getObject();