int[] nids = new int[dataset_.length];
// System.out.println("Beginning merge of " + dataset_.length + " DocumentDatas");
for (int i = 0; i < nids.length; i++) {
nids[i] = dataset_[i].nid_;
}
DocumentCollection result = new DocumentList(nids, database_);
// for (DocumentData data : dataset_) {
// result.merge(data.nid_);
// }
// System.out.println("Completed merge for a result size of " + result.getCount());
long endMemory = Runtime.getRuntime().freeMemory();