Update realtime to use timer to avoid memory leaks on busy tick

Author: jackycute

lib/realtime.js

@@ -354,9 +354,12 @@ function clearSocketQueue(queue, socket) {
 }
 
 function connectNextSocket() {
-    isConnectionBusy = false;
-    if (connectionSocketQueue.length > 0)
-        startConnection(connectionSocketQueue[0]);
+    setTimeout(function () {
+        isConnectionBusy = false;
+        if (connectionSocketQueue.length > 0) {
+            startConnection(connectionSocketQueue[0]);
+        }
+    }, 1);
 }
 
 function interruptConnection(socket, note, user) {
@@ -693,8 +696,11 @@ function operationCallback(socket, operation) {
         }
         note.tempUsers[userId] = Date.now();
     }
-    // save authorship
-    note.authorship = models.Note.updateAuthorshipByOperation(operation, userId, note.authorship);
+    // save authorship - use timer here because it's an O(n) complexity algorithm
+    setImmediate(function () {
+        note.authorship = models.Note.updateAuthorshipByOperation(operation, userId, note.authorship);
+    });
+}
 
 function updateHistory(userId, note, time) {
     var noteId = note.alias ? note.alias : LZString.compressToBase64(note.id);