More performant way of defining event listeners

app/server/sockets/events/chat.js

@@ -1,9 +1,11 @@
 module.exports = (socket) => {
 
-  socket.on('chat', (data) => {
+  function onChat(data) {
     if (socket.mcbot && socket.mcbot.entity) {
       socket.mcbot.chat(data.message);
     }
-  });
+  }
+
+  socket.on('chat', onChat);
 
 };

app/server/sockets/events/connection.js

@@ -3,7 +3,7 @@ import events     from '../../bot';
 
 module.exports = (socket) => {
 
-  socket.on('server:connect', (data) => {
+  function onConnection(data) {
 
     // log activity to console
     console.log(`connecting > ${data.hostname}:${data.port} - ${data.username}`);
@@ -36,6 +36,8 @@ module.exports = (socket) => {
     // bind bot events
     events(socket);
 
-  });
+  }
+
+  socket.on('server:connect', onConnection);
 
 };

app/server/sockets/events/disconnection.js

@@ -1,20 +1,14 @@
 module.exports = (socket) => {
 
-
-  socket.on('disconnect', () => {
+  function onDisconnection() {
     if (socket.mcbot) {
       socket.mcbot.end();
       delete socket.mcbot;
     }
-  });
+  }
 
 
-  socket.on('bot:disconnect', () => {
-    if (socket.mcbot) {
-      socket.mcbot.end();
-      delete socket.mcbot;
-    }
-  });
-
+  socket.on('disconnect', onDisconnection);
+  socket.on('bot:disconnect', onDisconnection);
 
 };

app/server/sockets/events/players.js

@@ -1,9 +1,11 @@
 module.exports = (socket) => {
 
-  socket.on('players', () => {
+  function onPlayers() {
     if (socket.mcbot && socket.mcbot.players) {
       socket.emit('bot:players', socket.mcbot.players);
     }
-  });
+  }
+
+  socket.on('players', onPlayers);
 
 };