From: Jason Kirtland <jek@discorporate.us>
Date: Sat, 22 Sep 2007 18:03:27 +0000 (+0000)
Subject: Added.
X-Git-Tag: rel_0_4beta6~19
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=75c2230476029916399a355aaa34a59fad62e196;p=thirdparty%2Fsqlalchemy%2Fsqlalchemy.git

Added.
---

diff --git a/test/perf/objselectspeed.py b/test/perf/objselectspeed.py
new file mode 100644
index 0000000000..905632ef21
--- /dev/null
+++ b/test/perf/objselectspeed.py
@@ -0,0 +1,104 @@
+import testbase
+import time, gc, resource
+from sqlalchemy import *
+from sqlalchemy.orm import *
+from testlib import *
+
+db = create_engine('sqlite://')
+metadata = MetaData(db)
+Person_table = Table('Person', metadata,
+                     Column('id', Integer, primary_key=True),
+                     Column('name', String(40)),
+                     Column('sex', Integer),
+                     Column('age', Integer))
+
+class RawPerson(object): pass
+class Person(object): pass
+mapper(Person, Person_table)
+compile_mappers()
+
+def setup():
+    metadata.create_all()
+    i = Person_table.insert()
+    data = [{'name':'John Doe','sex':1,'age':35}] * 100
+    for j in xrange(500):
+        i.execute(data)
+    print "Inserted 50,000 rows"
+
+def sqlite_select(entity_cls):
+    conn = db.connect().connection
+    cr = conn.cursor()
+    cr.execute("SELECT id, name, sex, age FROM Person")
+    people = []
+    for row in cr.fetchall():
+        person = entity_cls()
+        person.id = row[0]
+        person.name = row[1]
+        person.sex = row[2]
+        person.age = row[3]
+        people.append(person)
+    cr.close()
+    conn.close()
+
+def sql_select(entity_cls):
+    people = []
+    for row in Person_table.select().execute().fetchall():
+        person = entity_cls()
+        person.id = row.id
+        person.name = row.name
+        person.sex = row.sex
+        person.age = row.age
+        people.append(person)
+
+def orm_select():
+    session = create_session()
+    people = session.query(Person).all()
+
+def all():
+    setup()
+    try:
+        t, t2 = 0, 0
+        def usage(label):
+            now = resource.getrusage(resource.RUSAGE_SELF)
+            print "%s: %0.3fs real, %0.3fs user, %0.3fs sys" % (
+                label, t2 - t,
+                now.ru_utime - usage.last.ru_utime,
+                now.ru_stime - usage.last.ru_stime)
+            usage.last = now
+        usage.last = resource.getrusage(resource.RUSAGE_SELF)
+
+        gc.collect()
+        t = time.clock()
+        sqlite_select(RawPerson)
+        t2 = time.clock()
+        usage('sqlite select/native')
+
+        gc.collect()
+        t = time.clock()
+        sqlite_select(Person)
+        t2 = time.clock()
+        usage('sqlite select/instrumented')
+
+        gc.collect()
+        t = time.clock()
+        sql_select(RawPerson)
+        t2 = time.clock()
+        usage('sqlalchemy.sql select/native')
+
+        gc.collect()
+        t = time.clock()
+        sql_select(Person)
+        t2 = time.clock()
+        usage('sqlalchemy.sql select/instrumented')
+
+        gc.collect()
+        t = time.clock()
+        orm_select()
+        t2 = time.clock()
+        usage('sqlalchemy.orm fetch')
+    finally:
+        metadata.drop_all()
+
+
+if __name__ == '__main__':
+    all()