feat: use db.sortedSetsAdd

src/events.js

@@ -68,10 +68,10 @@ events.log = function (data, callback) {
 
 			async.parallel([
 				function (next) {
-					db.sortedSetAdd('events:time', data.timestamp, eid, next);
+					db.sortedSetsAdd([
-				},
+						'events:time',
-				function (next) {
+						'events:time:' + data.type,
-					db.sortedSetAdd('events:time:' + data.type, data.timestamp, eid, next);
+					], data.timestamp, eid, next);
 				},
 				function (next) {
 					db.setObject('event:' + eid, data, next);

src/topics/posts.js

@@ -261,19 +261,12 @@ module.exports = function (Topics) {
 				if (!parseInt(mainPid, 10)) {
 					Topics.setTopicField(tid, 'mainPid', postData.pid, next);
 				} else {
-					async.parallel([
+					const upvotes = parseInt(postData.upvotes, 10) || 0;
-						function (next) {
+					const downvotes = parseInt(postData.downvotes, 10) || 0;
-							db.sortedSetAdd('tid:' + tid + ':posts', postData.timestamp, postData.pid, next);
+					const votes = upvotes - downvotes;
-						},
+					db.sortedSetsAdd([
-						function (next) {
+						'tid:' + tid + ':posts', 'tid:' + tid + ':posts:votes',
-							var upvotes = parseInt(postData.upvotes, 10) || 0;
+					], [postData.timestamp, votes], postData.pid, next);
-							var downvotes = parseInt(postData.downvotes, 10) || 0;
-							var votes = upvotes - downvotes;
-							db.sortedSetAdd('tid:' + tid + ':posts:votes', votes, postData.pid, next);
-						},
-					], function (err) {
-						next(err);
-					});
 				}
 			},
 			function (next) {

src/user/create.js

@@ -74,7 +74,9 @@ module.exports = function (User) {
 						db.incrObjectField('global', 'userCount', next);
 					},
 					function (next) {
-						db.sortedSetAdd('username:uid', userData.uid, userData.username, next);
+						db.sortedSetsAdd([
+							'username:uid', 'user:' + userData.uid + ':usernames',
+						], [userData.uid, timestamp], userData.username, next);
 					},
 					function (next) {
 						db.sortedSetAdd('username:sorted', 0, userData.username.toLowerCase() + ':' + userData.uid, next);
@@ -92,9 +94,6 @@ module.exports = function (User) {
 					function (next) {
 						db.sortedSetsAdd(['users:postcount', 'users:reputation'], 0, userData.uid, next);
 					},
-					function (next) {
-						db.sortedSetAdd('user:' + userData.uid + ':usernames', timestamp, userData.username, next);
-					},
 					function (next) {
 						groups.join('registered-users', userData.uid, next);
 					},