//
// Size of [2000000] entries is 77.6mb
public static void main(String[] args) throws Exception {
String type = args.length > 0 ? args[0] : "nb";
VersionedMap versionedMap;
if ("nb".equalsIgnoreCase(type)) {
versionedMap = new ConcurrentVersionedMapLong();
} else if ("native".equalsIgnoreCase(type)) {
versionedMap = new NativeVersionedMap();
} else if ("concurrent".equalsIgnoreCase(type)) {