in base/src/main/java/org/apache/sling/performance/AbstractRepositoryTest.java [82:89]
protected Node getTestRootNode() throws RepositoryException, NamingException {
if(testRoot==null) {
final Node root = getSession().getRootNode();
final Node classRoot = root.addNode(getClass().getSimpleName());
testRoot = classRoot.addNode(System.currentTimeMillis() + "_" + (++counter));
}
return testRoot;
}