diff --git a/dmoj/urls.py b/dmoj/urls.py
index 72e81cb..01bbbd9 100644
--- a/dmoj/urls.py
+++ b/dmoj/urls.py
@@ -1069,6 +1069,26 @@ urlpatterns = [
                     internal.InternalProblem.as_view(),
                     name="internal_problem",
                 ),
+                url(
+                    r"^request_time$",
+                    internal.InternalRequestTime.as_view(),
+                    name="internal_request_time",
+                ),
+                url(
+                    r"^request_time_detail$",
+                    internal.InternalRequestTimeDetail.as_view(),
+                    name="internal_request_time_detail",
+                ),
+                url(
+                    r"^internal_slow_request$",
+                    internal.InternalSlowRequest.as_view(),
+                    name="internal_slow_request",
+                ),
+                url(
+                    r"^internal_slow_request_detail$",
+                    internal.InternalSlowRequestDetail.as_view(),
+                    name="internal_slow_request_detail",
+                ),
             ]
         ),
     ),
diff --git a/judge/middleware.py b/judge/middleware.py
index b86731d..ccd1547 100644
--- a/judge/middleware.py
+++ b/judge/middleware.py
@@ -1,5 +1,8 @@
 import time
 import logging
+import random
+import json
+from datetime import datetime
 
 from django.conf import settings
 from django.http import HttpResponseRedirect, Http404
@@ -148,17 +151,23 @@ class SlowRequestMiddleware(object):
         self.get_response = get_response
 
     def __call__(self, request):
-        logger = logging.getLogger("judge.slow_request")
+        logger = logging.getLogger("judge.request_time")
+        logger_slow = logging.getLogger("judge.slow_request")
         start_time = time.time()
         response = self.get_response(request)
         response_time = time.time() - start_time
+        url_name = resolve(request.path).url_name
+
+        message = {
+            "url_name": url_name,
+            "response_time": response_time * 1000,
+            "profile": request.user.username,
+            "date": datetime.now().strftime("%Y/%m/%d"),
+            "url": request.build_absolute_uri(),
+            "method": request.method,
+        }
         if response_time > 9:
-            message = {
-                "message": "Slow request",
-                "url": request.build_absolute_uri(),
-                "response_time": response_time * 1000,
-                "method": request.method,
-                "profile": request.profile,
-            }
-            logger.info(message)
+            logger_slow.info(json.dumps(message))
+        if random.random() < 0.1:
+            logger.info(json.dumps(message))
         return response
diff --git a/judge/views/internal.py b/judge/views/internal.py
index 45f9249..7c8e6f2 100644
--- a/judge/views/internal.py
+++ b/judge/views/internal.py
@@ -1,16 +1,27 @@
+import logging
+import json
+
 from django.views.generic import ListView
 from django.utils.translation import gettext as _, gettext_lazy
 from django.db.models import Count
 from django.http import HttpResponseForbidden
+from django.urls import reverse
 
 from judge.utils.diggpaginator import DiggPaginator
 from judge.models import VolunteerProblemVote, Problem
 
 
-class InternalProblem(ListView):
+class InternalView(object):
+    def get(self, request, *args, **kwargs):
+        if request.user.is_superuser:
+            return super(InternalView, self).get(request, *args, **kwargs)
+        return HttpResponseForbidden()
+
+
+class InternalProblem(ListView, InternalView):
     model = Problem
     title = _("Internal problems")
-    template_name = "internal/base.html"
+    template_name = "internal/problem.html"
     paginate_by = 100
     context_object_name = "problems"
 
@@ -44,7 +55,87 @@ class InternalProblem(ListView):
 
         return context
 
-    def get(self, request, *args, **kwargs):
-        if request.user.is_superuser:
-            return super(InternalProblem, self).get(request, *args, **kwargs)
-        return HttpResponseForbidden()
+
+class RequestTimeMixin(object):
+    def get_requests_data(self):
+        logger = logging.getLogger(self.log_name)
+        log_filename = logger.handlers[0].baseFilename
+        requests = []
+
+        with open(log_filename, "r") as f:
+            for line in f:
+                try:
+                    info = json.loads(line)
+                    requests.append(info)
+                except:
+                    continue
+        return requests
+
+
+class InternalRequestTime(ListView, InternalView, RequestTimeMixin):
+    title = _("Request times")
+    template_name = "internal/request_time.html"
+    context_object_name = "pages"
+    log_name = "judge.request_time"
+    detail_url_name = "internal_request_time_detail"
+    page_type = "request_time"
+
+    def get_queryset(self):
+        requests = self.get_requests_data()
+        table = {}
+        for r in requests:
+            url_name = r["url_name"]
+            if url_name not in table:
+                table[url_name] = {
+                    "time": 0,
+                    "count": 0,
+                    "url_name": url_name,
+                    "pattern": reverse(url_name) if url_name else None,
+                }
+            old_sum = table[url_name]["time"] * table[url_name]["count"]
+            table[url_name]["count"] += 1
+            table[url_name]["time"] = (old_sum + float(r["response_time"])) / table[
+                url_name
+            ]["count"]
+        order = self.request.GET.get("order", "time")
+        return sorted(table.values(), key=lambda x: x[order], reverse=True)
+
+    def get_context_data(self, **kwargs):
+        context = super(InternalRequestTime, self).get_context_data(**kwargs)
+        context["page_type"] = self.page_type
+        context["title"] = self.title
+        context["current_path"] = self.request.path
+        context["detail_path"] = reverse(self.detail_url_name)
+        return context
+
+
+class InternalRequestTimeDetail(InternalRequestTime):
+    template_name = "internal/request_time_detail.html"
+    context_object_name = "requests"
+
+    def get_queryset(self):
+        url_name = self.request.GET.get("url_name", None)
+        if not url_name:
+            return HttpResponseForbidden()
+        if url_name == "None":
+            url_name = None
+        self.title = url_name
+        requests = self.get_requests_data()
+        filtered_requests = [r for r in requests if r["url_name"] == url_name]
+        order = self.request.GET.get("order", "response_time")
+        return sorted(filtered_requests, key=lambda x: x[order], reverse=True)[:200]
+
+    def get_context_data(self, **kwargs):
+        context = super(InternalRequestTimeDetail, self).get_context_data(**kwargs)
+        context["url_name"] = self.request.GET.get("url_name", None)
+        return context
+
+
+class InternalSlowRequest(InternalRequestTime):
+    log_name = "judge.slow_request"
+    detail_url_name = "internal_slow_request_detail"
+    page_type = "slow_request"
+
+
+class InternalSlowRequestDetail(InternalRequestTimeDetail):
+    log_name = "judge.slow_request"
diff --git a/templates/internal/left-sidebar.html b/templates/internal/left-sidebar.html
new file mode 100644
index 0000000..64788be
--- /dev/null
+++ b/templates/internal/left-sidebar.html
@@ -0,0 +1,5 @@
+<div class="left-sidebar">
+  {{ make_tab_item('problem', 'fa fa-list', url('internal_problem'), _('Problem')) }}
+  {{ make_tab_item('request_time', 'fa fa-angle-right', url('internal_request_time'), _('Average speed')) }}
+  {{ make_tab_item('slow_request', 'fa fa-asterisk', url('internal_slow_request'), _('Slow requests')) }}
+</div>
diff --git a/templates/internal/base.html b/templates/internal/problem.html
similarity index 94%
rename from templates/internal/base.html
rename to templates/internal/problem.html
index 1df34d8..eebb02c 100644
--- a/templates/internal/base.html
+++ b/templates/internal/problem.html
@@ -25,9 +25,7 @@
 {% endblock %}
 
 {% block left_sidebar %}
-  <div class="left-sidebar">
-    {{ make_tab_item('problem', 'fa fa-list', url('internal_problem'), _('Problem')) }}
-  </div>
+  {% include "internal/left-sidebar.html" %}
 {% endblock %}
 
 {% block middle_content %}
diff --git a/templates/internal/request_time.html b/templates/internal/request_time.html
new file mode 100644
index 0000000..ce3118a
--- /dev/null
+++ b/templates/internal/request_time.html
@@ -0,0 +1,28 @@
+{% extends "two-column-content.html" %}
+
+{% block left_sidebar %}
+  {% include "internal/left-sidebar.html" %}
+{% endblock %}
+
+{% block middle_content %}
+  <table class="table">
+    <thead>
+      <tr>
+        <th>URL Name</th>
+        <th>Pattern</th>
+        <th><a href="{{current_path}}?order=time">Time (ms)</a></th>
+        <th><a href="{{current_path}}?order=count">Count</a></th>
+      </tr>
+    </thead>
+    <tbody>
+      {% for page in pages %}
+        <tr>
+          <td><a href="{{detail_path}}?url_name={{page['url_name']}}">{{page['url_name']}}</a></td>
+          <td>{{page['pattern']}}</td>
+          <td>{{page['time'] | floatformat(2)}}</td>
+          <td>{{page['count']}}</td>
+        </tr>
+      {% endfor %}
+    </tbody>
+  </table>
+{% endblock %}
\ No newline at end of file
diff --git a/templates/internal/request_time_detail.html b/templates/internal/request_time_detail.html
new file mode 100644
index 0000000..5e3c3bd
--- /dev/null
+++ b/templates/internal/request_time_detail.html
@@ -0,0 +1,36 @@
+{% extends "two-column-content.html" %}
+
+{% block left_sidebar %}
+  {% include "internal/left-sidebar.html" %}
+{% endblock %}
+
+{% block middle_content %}
+  <table class="table">
+    <thead>
+      <tr>
+        <th>Profile</th>
+        <th>URL</th>
+        <th>Method</th>
+        <th><a href="{{current_path}}?order=response_time&url_name={{url_name}}">Time (ms)</a></th>
+        <th><a href="{{current_path}}?order=date&url_name={{url_name}}">Date</a></th>
+      </tr>
+    </thead>
+    <tbody>
+      {% for request in requests %}
+        <tr>
+          <td>
+            {% if request['profile'] %}
+              <a href="/user/{{request['profile']}}">{{request['profile']}}</a>
+            {% else %}
+              None
+            {% endif %}
+          </td>
+          <td>{{request['url']}}</td>
+          <td>{{request['method']}}</td>
+          <td>{{request['response_time'] | floatformat(2)}}</td>
+          <td>{{request['date']}}</td>
+        </tr>
+      {% endfor %}
+    </tbody>
+  </table>
+{% endblock %}
\ No newline at end of file