updated contents from Atlas repo

dicts/dict_perftest.py

@@ -0,0 +1,34 @@
+"""
+Dict performance test
+"""
+
+import timeit
+
+SETUP = '''
+import array
+selected = array.array('d')
+with open('selected.arr', 'rb') as fp:
+    selected.fromfile(fp, {size})
+haystack = dict((n, n.as_integer_ratio()) for n in selected)
+print('haystack: %10d' % len(haystack), end='  ')
+needles = array.array('d')
+with open('not_selected.arr', 'rb') as fp:
+    needles.fromfile(fp, 500)
+needles.extend(selected[:500])
+# print(' needles: %10d' % len(needles), end='  ')
+'''
+
+TEST = '''
+found = 0
+for n in needles:
+    if n in haystack:
+        found += 1
+# print('  found: %10d' % found)
+'''
+
+MAX_EXPONENT = 7
+for n in range(3, MAX_EXPONENT + 1):
+    size = 10**n
+    setup = SETUP.format(size=size)
+    tt = timeit.repeat(stmt=TEST, setup=setup, repeat=5, number=1)
+    print('|{:{}d}|{:f}'.format(size, MAX_EXPONENT + 1, min(tt)))