From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Tue, 16 Sep 2014 15:57:03 +0000 (-0400)
Subject: - add differentiating examples of list() vs. iteration
X-Git-Tag: rel_1_0_0b1~193
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b9d430af752b7cc955932a54a8f8db18f46d89a6;p=thirdparty%2Fsqlalchemy%2Fsqlalchemy.git

- add differentiating examples of list() vs. iteration
---

diff --git a/examples/performance/large_resultsets.py b/examples/performance/large_resultsets.py
index 0a5857b75b..fbe77c759a 100644
--- a/examples/performance/large_resultsets.py
+++ b/examples/performance/large_resultsets.py
@@ -52,12 +52,18 @@ def setup_database(dburl, echo, num):
 
 
 @Profiler.profile
-def test_orm_full_objects(n):
-    """Load fully tracked objects using the ORM."""
+def test_orm_full_objects_list(n):
+    """Load fully tracked ORM objects into one big list()."""
+
+    sess = Session(engine)
+    objects = list(sess.query(Customer).limit(n))
+
+
+@Profiler.profile
+def test_orm_full_objects_chunks(n):
+    """Load fully tracked ORM objects a chunk at a time using yield_per()."""
 
     sess = Session(engine)
-    # avoid using all() so that we don't have the overhead of building
-    # a large list of full objects in memory
     for obj in sess.query(Customer).yield_per(1000).limit(n):
         pass