Show timings for index page data gathering

templates/index.html

@@ -125,6 +125,12 @@
     </li>
     <li>Bristol Sunrise: {{ sunrise.strftime("%H:%M:%S") }} /
     Sunset: {{ sunset.strftime("%H:%M:%S") }}</li>
+    <li>Data gather took {{ "%.1f" | format(data_gather_seconds) }} seconds</li>
+    <li>Stock market open/close took
+        {{ "%.1f" | format(stock_market_times_seconds) }} seconds</li>
+    {% for name, seconds in timings %}
+    <li>{{ name }} took {{ "%.1f" | format(seconds) }} seconds</li>
+    {% endfor %}
     </ul>
 
   <h3>Stock markets</h3>