Favor string concatenation over join()

lib/membership.js

@@ -64,15 +64,27 @@ Membership.prototype.findMemberByAddress = function findMemberByAddress(address)
 };
 
 Membership.prototype.generateChecksumString = function generateChecksumString() {
-    var checksumStrings = [];
+    var sortedMembers = this.members.sort(function sort(a, b) {
+        if (a.address < b.address) {
+            return -1;
+        } else if (a.address > b.address) {
+            return 1;
+        } else {
+            return 0;
+        }
+    });
+
+    var checksumString = '';
 
-    for (var i = 0; i < this.members.length; ++i) {
+    for (var i = 0; i < sortedMembers.length; ++i) {
         var member = this.members[i];
 
-        checksumStrings.push(member.address + member.status + member.incarnationNumber);
+        checksumString += member.address +
+            member.status +
+            member.incarnationNumber + ';';
     }
 
-    return checksumStrings.sort().join(';');
+    return checksumString.substring(0, checksumString.length - 1);
 };
 
 Membership.prototype.getIncarnationNumber = function getIncarnationNumber() {