Add a benchmark for singleton object construction

src/nti/externalization/tests/benchmarks/bm_singleton.py

@@ -0,0 +1,41 @@
+# -*- coding: utf-8 -*-
+"""
+Benchmark for creating singleton objects.
+
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import perf
+
+from nti.externalization.singleton import Singleton
+from nti.externalization.singleton import SingletonMetaclass
+
+# These are defined to have __slots__ = ()
+class SingletonSubclass(Singleton):
+    pass
+
+
+class ObjectSubclass(object):
+    __slots__ = ()
+    def __init__(self, _context=None, _request=None):
+        pass
+
+
+def main(runner=None):
+
+    runner = runner or perf.Runner()
+    runner.bench_func('Construct Singleton', SingletonSubclass)
+
+    runner.bench_func('Construct non-Singleton', ObjectSubclass)
+
+    runner.bench_func('Construct Singleton with args',
+                      SingletonSubclass, 'context', 'request')
+
+    runner.bench_func("Construct non-Singleton with args",
+                      ObjectSubclass, 'context', 'request')
+
+
+if __name__ == '__main__':
+    main()