Adding 90th %ile to the stats page

locust/stats.py

@@ -207,8 +207,13 @@ def avg_response_time(self):
     def median_response_time(self):
         if not self.response_times:
             return 0
+        return percentile_from_dict(self.num_requests, self.response_times, 50)
 
-        return median_from_dict(self.num_requests, self.response_times)
+    @property
+    def ninetieth_response_time(self):
+        if not self.response_times:
+            return 0
+        return percentile_from_dict(self.num_requests, self.response_times, 90)
 
     @property
     def current_rps(self):
@@ -411,18 +416,17 @@ def from_dict(cls, data):
 def avg(values):
     return sum(values, 0.0) / max(len(values), 1)
 
-def median_from_dict(total, count):
+def percentile_from_dict(total, count, percentile):
     """
     total is the number of requests made
     count is a dict {response_time: count}
     """
-    pos = (total - 1) / 2
+    pos = (total - 1) * (percentile / 100)
     for k in sorted(six.iterkeys(count)):
         if pos < count[k]:
             return k
         pos -= count[k]
 
-
 global_stats = RequestStats()
 """
 A global instance for holding the statistics. Should be removed eventually.

locust/templates/index.html

@@ -104,6 +104,7 @@ <h2>Change the locust count</h2>
                                 <th class="stats_label numeric" href="#" data-sortkey="num_requests" title="Number of successful requests"># requests</th>
                                 <th class="stats_label numeric" href="#" data-sortkey="num_failures" title="Number of failures"># fails</th>
                                 <th class="stats_label numeric" href="#" data-sortkey="median_response_time" title="Median response time">Median (ms)</th>
+                                <th class="stats_label numeric" href="#" data-sortkey="ninetieth_response_time" title="Ninetieth percentile response time">90%ile (ms)</th>
                                 <th class="stats_label numeric" href="#" data-sortkey="avg_response_time" title="Average response time">Average (ms)</th>
                                 <th class="stats_label numeric" href="#" data-sortkey="min_response_time" title="Min response time">Min (ms)</th>
                                 <th class="stats_label numeric" href="#" data-sortkey="max_response_time" title="Max response time">Max (ms)</th>
@@ -206,6 +207,7 @@ <h1>Version</h1>
             <td class="numeric"><%= this.num_requests %></td>
             <td class="numeric"><%= this.num_failures %></td>
             <td class="numeric"><%= Math.round(this.median_response_time) %></td>
+            <td class="numeric"><%= Math.round(this.ninetieth_response_time) %></td>
             <td class="numeric"><%= Math.round(this.avg_response_time) %></td>
             <td class="numeric"><%= this.min_response_time %></td>
             <td class="numeric"><%= this.max_response_time %></td>

locust/web.py

@@ -15,7 +15,7 @@
 from . import runners
 from .cache import memoize
 from .runners import MasterLocustRunner
-from locust.stats import median_from_dict
+from locust.stats import percentile_from_dict
 from locust import __version__ as version
 
 import logging
@@ -93,12 +93,13 @@ def request_stats_csv():
     ]
 
     for s in chain(_sort_stats(runners.locust_runner.request_stats), [runners.locust_runner.stats.aggregated_stats("Total", full_request_history=True)]):
-        rows.append('"%s","%s",%i,%i,%i,%i,%i,%i,%i,%.2f' % (
+        rows.append('"%s","%s",%i,%i,%i,%i,%i,%i,%i,%i,%.2f' % (
             s.method,
             s.name,
             s.num_requests,
             s.num_failures,
             s.median_response_time,
+            s.ninetieth_response_time,
             s.avg_response_time,
             s.min_response_time or 0,
             s.max_response_time,
@@ -156,6 +157,7 @@ def request_stats():
             "max_response_time": s.max_response_time,
             "current_rps": s.current_rps,
             "median_response_time": s.median_response_time,
+            "ninetieth_response_time": s.ninetieth_response_time,
             "avg_content_length": s.avg_content_length,
         })
 
@@ -178,7 +180,8 @@ def request_stats():
             response_times[stats[i]["median_response_time"]] += stats[i]["num_requests"]
 
         # calculate total median
-        stats[len(stats)-1]["median_response_time"] = median_from_dict(stats[len(stats)-1]["num_requests"], response_times)
+        stats[len(stats)-1]["median_response_time"] = percentile_from_dict(stats[len(stats)-1]["num_requests"], response_times, 50)
+        stats[len(stats)-1]["ninetieth_response_time"] = percentile_from_dict(stats[len(stats)-1]["num_requests"], response_times, 90)
 
     is_distributed = isinstance(runners.locust_runner, MasterLocustRunner)
     if is_distributed: