Altering the if/else logic of HashCodeBuilder.append(Object) as per LANG-345 to get 20->40% speed improvements. This is because the code no longer uses Class.isArray() on every invocation. Many thanks to Venkatesh Prasad Ranganath for offering this improvement.
commons/proper/lang/trunk/src/java/org/apache/commons/lang/builder/HashCodeBuilder.java