Added performance test to compare inst.__class__() vs type(inst)() class. The first one is faster, although I would have expected the latter one to be faster

Byron · Byron · commit 24740f22c59c · 2010-07-14T14:27:27.000+02:00
diff --git a/lib/git/ext/gitdb b/lib/git/ext/gitdb
@@ -1 +1 @@
-Subproject commit 18152febd428e67b86bb4fb68ec1691d4de75a9c
+Subproject commit 425ecf04aa5038c3d46b01ca20de17c51ef6c4e5
diff --git a/test/git/performance/test_utils.py b/test/git/performance/test_utils.py
@@ -151,3 +151,24 @@ def slow_iter(ni):
 			print >> sys.stderr, "Iterated %i items from iterator in %f s ( %f acc / s)" % (ni, elapsed, ni / elapsed)
 		# END for each number of iterations
 		
+	def test_type_vs_inst_class(self):
+		class NewType(object):
+			pass
+		
+		# lets see which way is faster
+		inst = NewType()
+		
+		ni = 1000000
+		st = time()
+		for i in xrange(ni):
+			inst.__class__()
+		# END for each item
+		elapsed = time() - st
+		print >> sys.stderr, "Created %i items using inst.__class__ in %f s ( %f items / s)" % (ni, elapsed, ni / elapsed)
+		
+		st = time()
+		for i in xrange(ni):
+			type(inst)()
+		# END for each item
+		elapsed = time() - st
+		print >> sys.stderr, "Created %i items using type(inst)() in %f s ( %f items / s)" % (ni, elapsed, ni / elapsed)
