diff --git a/parity/main.rs b/parity/main.rs
index 43a249886..7fd8fb029 100644
--- a/parity/main.rs
+++ b/parity/main.rs
@@ -63,6 +63,7 @@ Options:
   --listen-address URL     Specify the IP/port on which to listen for peers [default: 0.0.0.0:30304].
   --public-address URL     Specify the IP/port on which peers may connect [default: 0.0.0.0:30304].
   --address URL            Equivalent to --listen-address URL --public-address URL.
+  --upnp                   Use UPnP to try to figure out the correct network settings.
 
   --cache-pref-size BYTES  Specify the prefered size of the blockchain cache in bytes [default: 16384].
   --cache-max-size BYTES   Specify the maximum size of the blockchain cache in bytes [default: 262144].
@@ -191,7 +192,7 @@ impl Informant {
 		let sync_info = sync.status();
 
 		if let (_, &Some(ref last_cache_info), &Some(ref last_report)) = (self.chain_info.read().unwrap().deref(), self.cache_info.read().unwrap().deref(), self.report.read().unwrap().deref()) {
-			println!("[ {} {} ]---[ {} blk/s | {} tx/s | {} gas/s  //··· {}/{} peers, {} downloaded, {}+{} queued ···//  {} ({}) bl  {} ({}) ex ]",
+			println!("[ {} {} ]---[ {} blk/s | {} tx/s | {} gas/s  ··· {}/{} peers, {} downloaded, {}+{} queued ···  {} ({}) bl  {} ({}) ex | {} i/c ]",
 				chain_info.best_block_number,
 				chain_info.best_block_hash,
 				(report.blocks_imported - last_report.blocks_imported) / dur,
@@ -207,7 +208,9 @@ impl Informant {
 				cache_info.blocks,
 				cache_info.blocks as isize - last_cache_info.blocks as isize,
 				cache_info.block_details,
-				cache_info.block_details as isize - last_cache_info.block_details as isize
+				cache_info.block_details as isize - last_cache_info.block_details as isize,
+
+				updates_per_commit()
 			);
 		}
 
diff --git a/util/src/network/host.rs b/util/src/network/host.rs
index 50cf294bc..3888cdf60 100644
--- a/util/src/network/host.rs
+++ b/util/src/network/host.rs
@@ -86,6 +86,26 @@ impl NetworkConfiguration {
 		config.public_address = SocketAddr::from_str(&format!("0.0.0.0:{}", port)).unwrap();
 		config
 	}
+
+	/// Conduct NAT if needed.
+	pub fn prepared(self) -> Self {
+		let listen = self.listen_address;
+		let public = self.public_address;
+
+		if self.nat_enabled {
+			info!("Enabling NAT");
+		}
+
+		NetworkConfiguration {
+			listen_address: listen,
+			public_address: public,
+			nat_enabled: false,
+			discovery_enabled: self.discovery_enabled,
+			pin: self.pin,
+			boot_nodes: self.boot_nodes,
+			use_secret: self.use_secret,
+		}
+	}
 }
 
 // Tokens
@@ -296,6 +316,8 @@ pub struct Host<Message> where Message: Send + Sync + Clone {
 impl<Message> Host<Message> where Message: Send + Sync + Clone {
 	/// Create a new instance
 	pub fn new(config: NetworkConfiguration) -> Host<Message> {
+		let config = config.prepared();
+
 		let addr = config.listen_address;
 		// Setup the server socket
 		let tcp_listener = TcpListener::bind(&addr).unwrap();
diff --git a/util/src/trie/sectriedbmut.rs b/util/src/trie/sectriedbmut.rs
index 662f6852a..5d0ef7ec3 100644
--- a/util/src/trie/sectriedbmut.rs
+++ b/util/src/trie/sectriedbmut.rs
@@ -14,6 +14,8 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
+use std::sync::RwLock;
+use std::cell::RefCell;
 use hash::*;
 use sha3::*;
 use hashdb::*;
@@ -21,11 +23,26 @@ use rlp::*;
 use super::triedbmut::*;
 use super::trietraits::*;
 
+lazy_static! {
+	static ref COMMIT_COUNT: RwLock<usize> = RwLock::new(0);
+	static ref UPDATE_COUNT: RwLock<usize> = RwLock::new(0);
+}
+
+/// Get mean number of updates per commit so far.
+pub fn updates_per_commit() -> f64 {
+	let cc = *COMMIT_COUNT.read().unwrap();
+	if cc > 0 {
+		(*UPDATE_COUNT.read().unwrap() as f64) / (cc as f64)
+	} else { 0.0 }
+}
+
 /// A mutable `Trie` implementation which hashes keys and uses a generic `HashDB` backing database.
 /// 
 /// Use it as a `Trie` or `TrieMut` trait object. You can use `raw()` to get the backing TrieDBMut object.
 pub struct SecTrieDBMut<'db> {
-	raw: TrieDBMut<'db>
+	raw: TrieDBMut<'db>,
+	/// Get number of updates done on this trie so far.
+	pub update_count: RefCell<usize>,
 }
 
 impl<'db> SecTrieDBMut<'db> {
@@ -33,13 +50,13 @@ impl<'db> SecTrieDBMut<'db> {
 	/// Initialise to the state entailed by the genesis block.
 	/// This guarantees the trie is built correctly.
 	pub fn new(db: &'db mut HashDB, root: &'db mut H256) -> Self { 
-		SecTrieDBMut { raw: TrieDBMut::new(db, root) }
+		SecTrieDBMut { raw: TrieDBMut::new(db, root), update_count: RefCell::new(0) }
 	}
 
 	/// Create a new trie with the backing database `db` and `root`
 	/// Panics, if `root` does not exist
 	pub fn from_existing(db: &'db mut HashDB, root: &'db mut H256) -> Self {
-		SecTrieDBMut { raw: TrieDBMut::from_existing(db, root) }
+		SecTrieDBMut { raw: TrieDBMut::from_existing(db, root), update_count: RefCell::new(0) }
 	}
 
 	/// Get the backing database.
@@ -50,7 +67,9 @@ impl<'db> SecTrieDBMut<'db> {
 }
 
 impl<'db> Trie for SecTrieDBMut<'db> {
-	fn root(&self) -> &H256 { self.raw.root() }
+	fn root(&self) -> &H256 {
+		self.raw.root()
+	}
 
 	fn contains(&self, key: &[u8]) -> bool {
 		self.raw.contains(&key.sha3())
@@ -63,14 +82,27 @@ impl<'db> Trie for SecTrieDBMut<'db> {
 
 impl<'db> TrieMut for SecTrieDBMut<'db> {
 	fn insert(&mut self, key: &[u8], value: &[u8]) {
+		*self.update_count.borrow_mut() += 1;
 		self.raw.insert(&key.sha3(), value);
 	}
 
 	fn remove(&mut self, key: &[u8]) {
+		*self.update_count.borrow_mut() += 1;
 		self.raw.remove(&key.sha3());
 	}
 }
 
+impl<'db> Drop for SecTrieDBMut<'db> {
+	fn drop(&mut self) {
+		let uc = *self.update_count.borrow();
+		if uc > 0 {
+			*COMMIT_COUNT.write().unwrap() += 1;
+			*UPDATE_COUNT.write().unwrap() += uc;
+			*self.update_count.borrow_mut() = 0;
+		}
+	}
+}
+
 #[test]
 fn sectrie_to_trie() {
 	use memorydb::*;