diff --git a/modules/submission.js b/modules/submission.js
index 8b2e1ce..af2a6b3 100644
--- a/modules/submission.js
+++ b/modules/submission.js
@@ -87,36 +87,46 @@ app.get('/submissions', async (req, res) => {
   }
 });
 
-app.get('/submissions/:id/ajax', async (req, res) => {
+app.get('/submissions/:ids/ajax', async (req, res) => {
   try {
-    let judge_state = await JudgeState.fromID(req.params.id);
-    if (!judge_state) throw new ErrorMessage('无此提交记录。');
+    let ids = req.params.ids.split(','), rendered = {};
 
-    await judge_state.loadRelationships();
+    for (let id of ids) {
+      let judge_state = await JudgeState.fromID(id);
+      if (!judge_state) throw new ErrorMessage('无此提交记录。');
 
-    judge_state.allowedSeeCode = await judge_state.isAllowedSeeCodeBy(res.locals.user);
-    judge_state.allowedSeeData = await judge_state.isAllowedSeeDataBy(res.locals.user);
+      await judge_state.loadRelationships();
 
-    let contest;
-    if (judge_state.type === 1) {
-      contest = await Contest.fromID(judge_state.type_info);
-      contest.ended = await contest.isEnded();
+      judge_state.allowedSeeCode = await judge_state.isAllowedSeeCodeBy(res.locals.user);
+      judge_state.allowedSeeData = await judge_state.isAllowedSeeDataBy(res.locals.user);
 
-      let problems_id = await contest.getProblems();
-      judge_state.problem_id = problems_id.indexOf(judge_state.problem_id) + 1;
-      judge_state.problem.title = syzoj.utils.removeTitleTag(judge_state.problem.title);
+      let contest;
+      if (judge_state.type === 1) {
+        contest = await Contest.fromID(judge_state.type_info);
+        contest.ended = await contest.isEnded();
 
-      if (contest.type === 'noi' && !contest.ended && !await judge_state.problem.isAllowedEditBy(res.locals.user)) {
-        if (!['Compile Error', 'Waiting', 'Compiling'].includes(judge_state.status)) {
-          judge_state.status = 'Submitted';
+        let problems_id = await contest.getProblems();
+        judge_state.problem_id = problems_id.indexOf(judge_state.problem_id) + 1;
+        judge_state.problem.title = syzoj.utils.removeTitleTag(judge_state.problem.title);
+
+        if (contest.type === 'noi' && !contest.ended && !await judge_state.problem.isAllowedEditBy(res.locals.user)) {
+          if (!['Compile Error', 'Waiting', 'Compiling'].includes(judge_state.status)) {
+            judge_state.status = 'Submitted';
+          }
         }
       }
+
+      let o = { pending: judge_state.pending, html: null, status: judge_state.status };
+
+      o.html = await require('util').promisify(app.render).bind(app)('submissions_item', {
+        contest: contest,
+        judge: judge_state
+      });
+
+      rendered[id] = o;
     }
 
-    res.render('submissions_item', {
-      contest: contest,
-      judge: judge_state
-    });
+    res.send(rendered);
   } catch (e) {
     syzoj.log(e);
     res.render('error', {
diff --git a/views/submissions.ejs b/views/submissions.ejs
index 00c3ea0..ca06fa8 100644
--- a/views/submissions.ejs
+++ b/views/submissions.ejs
@@ -77,7 +77,9 @@
       </tr>
     </thead>
     <tbody>
+      <% let ids = []; %>
       <% for (let judge of judge_state) { %>
+        <% if (judge.pending) ids.push(judge.id); %>
         <tr id="submissions_<%= judge.id %>"><% include submissions_item %></tr>
       <% } %>
     </tbody>
@@ -93,5 +95,26 @@ $(function () {
   $('#select_language').dropdown();
   $('#select_status').dropdown();
 });
+
+var ids = <%= JSON.stringify(ids) %>;
+function update() {
+  setTimeout(function () {
+    $.get('/submissions/' + ids.join(',') + '/ajax', function (data) {
+      var newIDs = [];
+      for (var id in data) {
+        if (data[id].pending) newIDs.push(id);
+        var e = $('#submissions_' + id);
+        if (e.find('span.status').text().trim() !== data[id].status) e.html(data[id].html);
+      }
+
+      if (newIDs.length > 0) {
+        ids = newIDs;
+        update();
+      }
+    });
+  }, 500);
+}
+
+update();
 </script>
 <% include footer %>
diff --git a/views/submissions_item.ejs b/views/submissions_item.ejs
index 8de86f6..20bc867 100644
--- a/views/submissions_item.ejs
+++ b/views/submissions_item.ejs
@@ -33,21 +33,4 @@ textFit(e, { maxFontSize: 14 });
 <% } %>
 <td><a href="<%= syzoj.utils.makeUrl(['user', judge.user_id]) %>"><%= judge.user.username %></a><% if (judge.user.nameplate) { %><%- judge.user.nameplate %><% } %></td>
 <td><%= syzoj.utils.formatDate(judge.submit_time) %>
-<% if (isPending(judge.status)) { %>
-<script>
-function update_judge_<%= judge.id %>() {
-  setTimeout(function () {
-<%
-let url = syzoj.utils.makeUrl(['submissions', judge.id, 'ajax']);
-%>
-    $.get('<%= url %>', function (data) {
-      var e = $('#submissions_<%= judge.id %>');
-      if (e.html() != data) e.html(data);
-      else update_judge_<%= judge.id %>();
-    });
-  }, 500);
-}
-update_judge_<%= judge.id %>();
-</script>
-<% } %>
 </td>