node.js - Which from these approaches is better while using Socket IO, Node and Redis for production? -

i want know best approach production.

1 create redis client each socket connected socket io in node backend. example:

    io.on('connection', function (socket) {         var redis = redis.createclient();         redis.on("message", function(channel, data) {            //emit sockets, emit socket or broadcast         }    } 

2. create 1 redis client , store in hashmap (nodejs/js object) connected sockets , when receive redis event emit sockets want (you may use whatever filtering logic want on users array). example:

 var redis = redis.createclient();  redis.subscribe('some-channel');  redis.on("message", function(channel, data) {      (var = 0; < users.length; i++)      {          io.to(users.socketid).emit("your-event", "your-data");      }  }   io.on('connection', function (socket) {         users.push({               socketid: socket.id            });  } 

in first approach worried about

• the performance, because iterate on connected clients in loop while second approach has 1 redis client each socket , emits that
• when close 1 redis connection ? in second approach can close redis client of respective socket on socket disconnect event

your other possible approaches more welcomed, these 2 approaches know far.