Update scheduler demo to illustrate performance differences (#178)

Author: Mike McCarty

05_distributed.ipynb

@@ -72,8 +72,8 @@
     "                        'CRSElapsedTime': float,\n",
     "                        'Cancelled': bool})\n",
     "\n",
-    "# Maximum non-cancelled delay\n",
-    "largest_delay = df[~df.Cancelled].DepDelay.max()\n",
+    "# Maximum average non-cancelled delay grouped by Airport\n",
+    "largest_delay = df[~df.Cancelled].groupby('Origin').DepDelay.mean().max()\n",
     "largest_delay"
    ]
   },
@@ -88,9 +88,9 @@
     "import time\n",
     "for sch in ['threading', 'processes', 'sync']:\n",
     "    t0 = time.time()\n",
-    "    _ = largest_delay.compute(scheduler=sch)\n",
+    "    r = largest_delay.compute(scheduler=sch)\n",
     "    t1 = time.time()\n",
-    "    print(f\"{sch:>10}, {t1 - t0:0.4f}\")"
+    "    print(f\"{sch:>10}, {t1 - t0:0.4f} s; result, {r:0.2f} hours\")"
    ]
   },
   {