diff --git a/src/database/mongo/sorted/add.js b/src/database/mongo/sorted/add.js
index c85b1d15e7..61c03602f6 100644
--- a/src/database/mongo/sorted/add.js
+++ b/src/database/mongo/sorted/add.js
@@ -72,8 +72,17 @@ module.exports = function (db, module) {
 			bulk.find({ _key: keys[i], value: value }).upsert().updateOne({ $set: { score: parseFloat(isArrayOfScores ? scores[i] : scores) } });
 		}
 
-		bulk.execute(function (err) {
-			callback(err);
+		bulk.execute(err =>	callback(err));
+	};
+
+	module.sortedSetAddBulk = function (data, callback) {
+		if (!Array.isArray(data) || !data.length) {
+			return setImmediate(callback);
+		}
+		var bulk = db.collection('objects').initializeUnorderedBulkOp();
+		data.forEach(function (item) {
+			bulk.find({ _key: item[0], value: String(item[2]) }).upsert().updateOne({ $set: { score: parseFloat(item[1]) } });
 		});
+		bulk.execute(err => callback(err));
 	};
 };
diff --git a/src/database/postgres/sorted/add.js b/src/database/postgres/sorted/add.js
index 5293a2635d..6fc70fe378 100644
--- a/src/database/postgres/sorted/add.js
+++ b/src/database/postgres/sorted/add.js
@@ -125,4 +125,37 @@ INSERT INTO "legacy_zset" ("_key", "value", "score")
 			});
 		}, callback);
 	};
+
+	module.sortedSetAddBulk = function (data, callback) {
+		if (!Array.isArray(data) || !data.length) {
+			return setImmediate(callback);
+		}
+		const keys = [];
+		const values = [];
+		const scores = [];
+		data.forEach(function (item) {
+			keys.push(item[0]);
+			scores.push(item[1]);
+			values.push(item[2]);
+		});
+		module.transaction(function (tx, done) {
+			var query = tx.client.query.bind(tx.client);
+
+			async.series([
+				async.apply(helpers.ensureLegacyObjectsType, tx.client, keys, 'zset'),
+				async.apply(query, {
+					name: 'sortedSetAddBulk2',
+					text: `
+INSERT INTO "legacy_zset" ("_key", "value", "score")
+SELECT k, v, s
+  FROM UNNEST($1::TEXT[], $2::TEXT[], $3::NUMERIC[]) vs(k, v, s)
+    ON CONFLICT ("_key", "value")
+    DO UPDATE SET "score" = EXCLUDED."score"`,
+					values: [keys, values, scores],
+				}),
+			], function (err) {
+				done(err);
+			});
+		}, callback);
+	};
 };
diff --git a/src/database/redis/sorted/add.js b/src/database/redis/sorted/add.js
index 47f71191e8..6cd6cc46a8 100644
--- a/src/database/redis/sorted/add.js
+++ b/src/database/redis/sorted/add.js
@@ -69,4 +69,15 @@ module.exports = function (redisClient, module) {
 			callback(err);
 		});
 	};
+
+	module.sortedSetAddBulk = function (data, callback) {
+		if (!Array.isArray(data) || !data.length) {
+			return setImmediate(callback);
+		}
+		var batch = redisClient.batch();
+		data.forEach(function (item) {
+			batch.zadd(item[0], item[1], item[2]);
+		});
+		batch.exec(err => callback(err));
+	};
 };
diff --git a/src/user/create.js b/src/user/create.js
index 70dfa90fbf..00fbddaff1 100644
--- a/src/user/create.js
+++ b/src/user/create.js
@@ -74,25 +74,26 @@ module.exports = function (User) {
 						db.incrObjectField('global', 'userCount', next);
 					},
 					function (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);
-					},
-					function (next) {
-						db.sortedSetAdd('userslug:uid', userData.uid, userData.userslug, next);
-					},
-					function (next) {
-						var sets = ['users:joindate', 'users:online'];
+						const bulk = [
+							['username:uid', userData.uid, userData.username],
+							['user:' + userData.uid + ':usernames', timestamp, userData.username],
+							['username:sorted', 0, userData.username.toLowerCase() + ':' + userData.uid],
+							['userslug:uid', userData.uid, userData.userslug],
+							['users:joindate', timestamp, userData.uid],
+							['users:online', timestamp, userData.uid],
+							['users:postcount', 0, userData.uid],
+							['users:reputation', 0, userData.uid],
+						];
+
 						if (parseInt(userData.uid, 10) !== 1) {
-							sets.push('users:notvalidated');
+							bulk.push(['users:notvalidated', timestamp, userData.uid]);
 						}
-						db.sortedSetsAdd(sets, timestamp, userData.uid, next);
-					},
-					function (next) {
-						db.sortedSetsAdd(['users:postcount', 'users:reputation'], 0, userData.uid, next);
+						if (userData.email) {
+							bulk.push(['email:uid', userData.uid, userData.email.toLowerCase()]);
+							bulk.push(['email:sorted', 0, userData.email.toLowerCase() + ':' + userData.uid]);
+							bulk.push(['user:' + userData.uid + ':emails', timestamp, userData.email]);
+						}
+						db.sortedSetAddBulk(bulk, next);
 					},
 					function (next) {
 						groups.join('registered-users', userData.uid, next);
@@ -101,23 +102,12 @@ module.exports = function (User) {
 						User.notifications.sendWelcomeNotification(userData.uid, next);
 					},
 					function (next) {
-						if (userData.email) {
-							async.parallel([
-								async.apply(db.sortedSetAdd, 'email:uid', userData.uid, userData.email.toLowerCase()),
-								async.apply(db.sortedSetAdd, 'email:sorted', 0, userData.email.toLowerCase() + ':' + userData.uid),
-								async.apply(db.sortedSetAdd, 'user:' + userData.uid + ':emails', timestamp, userData.email),
-							], next);
-
-							if (userData.uid > 1 && meta.config.requireEmailConfirmation) {
-								User.email.sendValidationEmail(userData.uid, {
-									email: userData.email,
-								});
-							}
-						} else {
-							next();
+						if (userData.email && userData.uid > 1 && meta.config.requireEmailConfirmation) {
+							User.email.sendValidationEmail(userData.uid, {
+								email: userData.email,
+							});
 						}
-					},
-					function (next) {
+
 						if (!data.password) {
 							return next();
 						}
diff --git a/test/database/sorted.js b/test/database/sorted.js
index 4d17a50379..ea8a7feb25 100644
--- a/test/database/sorted.js
+++ b/test/database/sorted.js
@@ -120,6 +120,34 @@ describe('Sorted Set methods', function () {
 		});
 	});
 
+	describe('sortedSetAddMulti()', function () {
+		it('should add elements into multiple sorted sets with different scores', function (done) {
+			db.sortedSetAddBulk([
+				['bulk1', 1, 'item1'],
+				['bulk2', 2, 'item1'],
+				['bulk2', 3, 'item2'],
+				['bulk3', 4, 'item3'],
+			], function (err) {
+				assert.ifError(err);
+				assert.equal(arguments.length, 1);
+				db.getSortedSetRevRangeWithScores(['bulk1', 'bulk2', 'bulk3'], 0, -1, function (err, data) {
+					assert.ifError(err);
+					assert.deepStrictEqual(data, [{ value: 'item3', score: 4 },
+						{ value: 'item2', score: 3 },
+						{ value: 'item1', score: 2 },
+						{ value: 'item1', score: 1 }]);
+					done();
+				});
+			});
+		});
+		it('should not error if data is undefined', function (done) {
+			db.sortedSetAddBulk(undefined, function (err) {
+				assert.ifError(err);
+				done();
+			});
+		});
+	});
+
 	describe('getSortedSetRange()', function () {
 		it('should return the lowest scored element', function (done) {
 			db.getSortedSetRange('sortedSetTest1', 0, 0, function (err, value) {