Add benchmarking script from issue 109

Author: grantjenks

tests/issue_109.py

@@ -0,0 +1,51 @@
+from time import time, sleep
+from diskcache import FanoutCache
+
+# Initialise the maximum delay reference
+max_delay = 0
+
+# Initialise the reference to current time
+# Add a significant amount of time to ignore the first measurement due to other initialisations
+current_time = time() + 100
+
+# Initialise the Fanout Cache instance
+data = FanoutCache('test', shards=8)
+
+
+# Declare the function used to modify the data
+def set_data(**kwargs):
+    """
+
+    Function used to modify the cache.
+
+    :param kwargs: Key, value pairs of data to modify.
+
+    """
+
+    # Fetch the global variables
+    global max_delay
+    global current_time
+    global data
+
+    # Update the data with the given keyword arguments
+    for key, value in kwargs.items():
+
+        # Measure the time taken to update it for each item
+        temp = time()
+        dif = temp - current_time
+        if dif > max_delay:
+            max_delay = dif
+            print("New max delay encountered: ", max_delay)
+        current_time = temp
+
+        # Update the data
+        data[key] = value
+
+
+# Initialise some test values
+test_values = {str(key): value for key in range(25) for value in range(25)}
+
+# Keep writing the data in 0.1 sec intervals
+while True:
+    sleep(0.1)
+    set_data(**test_values)