Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
number of tests, all because of the codecs/_multibytecodecs issue described
here (it's not a Py3K issue, just something Py3K discovers):
http://mail.python.org/pipermail/python-dev/2006-April/064051.html

Hye-Shik Chang promised to look for a fix, so no need to fix it here. The
tests that are expected to break are:

test_codecencodings_cn
test_codecencodings_hk
test_codecencodings_jp
test_codecencodings_kr
test_codecencodings_tw
test_codecs
test_multibytecodec

This merge fixes an actual test failure (test_weakref) in this branch,
though, so I believe merging is the right thing to do anyway.
diff --git a/Tools/pybench/Lookups.py b/Tools/pybench/Lookups.py
new file mode 100644
index 0000000..fbbc0ed
--- /dev/null
+++ b/Tools/pybench/Lookups.py
@@ -0,0 +1,946 @@
+from pybench import Test
+
+class SpecialClassAttribute(Test):
+
+    version = 0.3
+    operations = 5*(12 + 12)
+    rounds = 100000
+
+    def test(self):
+
+        class c:
+            pass
+
+        for i in xrange(self.rounds):
+
+            c.__a = 2
+            c.__b = 3
+            c.__c = 4
+
+            c.__a = 2
+            c.__b = 3
+            c.__c = 4
+
+            c.__a = 2
+            c.__b = 3
+            c.__c = 4
+
+            c.__a = 2
+            c.__b = 3
+            c.__c = 4
+
+            x = c.__a
+            x = c.__b
+            x = c.__c
+
+            x = c.__a
+            x = c.__b
+            x = c.__c
+
+            x = c.__a
+            x = c.__b
+            x = c.__c
+
+            x = c.__a
+            x = c.__b
+            x = c.__c
+
+            c.__a = 2
+            c.__b = 3
+            c.__c = 4
+
+            c.__a = 2
+            c.__b = 3
+            c.__c = 4
+
+            c.__a = 2
+            c.__b = 3
+            c.__c = 4
+
+            c.__a = 2
+            c.__b = 3
+            c.__c = 4
+
+            x = c.__a
+            x = c.__b
+            x = c.__c
+
+            x = c.__a
+            x = c.__b
+            x = c.__c
+
+            x = c.__a
+            x = c.__b
+            x = c.__c
+
+            x = c.__a
+            x = c.__b
+            x = c.__c
+
+            c.__a = 2
+            c.__b = 3
+            c.__c = 4
+
+            c.__a = 2
+            c.__b = 3
+            c.__c = 4
+
+            c.__a = 2
+            c.__b = 3
+            c.__c = 4
+
+            c.__a = 2
+            c.__b = 3
+            c.__c = 4
+
+            x = c.__a
+            x = c.__b
+            x = c.__c
+
+            x = c.__a
+            x = c.__b
+            x = c.__c
+
+            x = c.__a
+            x = c.__b
+            x = c.__c
+
+            x = c.__a
+            x = c.__b
+            x = c.__c
+
+            c.__a = 2
+            c.__b = 3
+            c.__c = 4
+
+            c.__a = 2
+            c.__b = 3
+            c.__c = 4
+
+            c.__a = 2
+            c.__b = 3
+            c.__c = 4
+
+            c.__a = 2
+            c.__b = 3
+            c.__c = 4
+
+            x = c.__a
+            x = c.__b
+            x = c.__c
+
+            x = c.__a
+            x = c.__b
+            x = c.__c
+
+            x = c.__a
+            x = c.__b
+            x = c.__c
+
+            x = c.__a
+            x = c.__b
+            x = c.__c
+
+            c.__a = 2
+            c.__b = 3
+            c.__c = 4
+
+            c.__a = 2
+            c.__b = 3
+            c.__c = 4
+
+            c.__a = 2
+            c.__b = 3
+            c.__c = 4
+
+            c.__a = 2
+            c.__b = 3
+            c.__c = 4
+
+            x = c.__a
+            x = c.__b
+            x = c.__c
+
+            x = c.__a
+            x = c.__b
+            x = c.__c
+
+            x = c.__a
+            x = c.__b
+            x = c.__c
+
+            x = c.__a
+            x = c.__b
+            x = c.__c
+
+    def calibrate(self):
+
+        class c:
+            pass
+
+        for i in xrange(self.rounds):
+            pass
+
+class NormalClassAttribute(Test):
+
+    version = 0.3
+    operations = 5*(12 + 12)
+    rounds = 100000
+
+    def test(self):
+
+        class c:
+            pass
+
+        for i in xrange(self.rounds):
+
+            c.a = 2
+            c.b = 3
+            c.c = 4
+
+            c.a = 2
+            c.b = 3
+            c.c = 4
+
+            c.a = 2
+            c.b = 3
+            c.c = 4
+
+            c.a = 2
+            c.b = 3
+            c.c = 4
+
+
+            x = c.a
+            x = c.b
+            x = c.c
+
+            x = c.a
+            x = c.b
+            x = c.c
+
+            x = c.a
+            x = c.b
+            x = c.c
+
+            x = c.a
+            x = c.b
+            x = c.c
+
+            c.a = 2
+            c.b = 3
+            c.c = 4
+
+            c.a = 2
+            c.b = 3
+            c.c = 4
+
+            c.a = 2
+            c.b = 3
+            c.c = 4
+
+            c.a = 2
+            c.b = 3
+            c.c = 4
+
+
+            x = c.a
+            x = c.b
+            x = c.c
+
+            x = c.a
+            x = c.b
+            x = c.c
+
+            x = c.a
+            x = c.b
+            x = c.c
+
+            x = c.a
+            x = c.b
+            x = c.c
+
+            c.a = 2
+            c.b = 3
+            c.c = 4
+
+            c.a = 2
+            c.b = 3
+            c.c = 4
+
+            c.a = 2
+            c.b = 3
+            c.c = 4
+
+            c.a = 2
+            c.b = 3
+            c.c = 4
+
+
+            x = c.a
+            x = c.b
+            x = c.c
+
+            x = c.a
+            x = c.b
+            x = c.c
+
+            x = c.a
+            x = c.b
+            x = c.c
+
+            x = c.a
+            x = c.b
+            x = c.c
+
+            c.a = 2
+            c.b = 3
+            c.c = 4
+
+            c.a = 2
+            c.b = 3
+            c.c = 4
+
+            c.a = 2
+            c.b = 3
+            c.c = 4
+
+            c.a = 2
+            c.b = 3
+            c.c = 4
+
+
+            x = c.a
+            x = c.b
+            x = c.c
+
+            x = c.a
+            x = c.b
+            x = c.c
+
+            x = c.a
+            x = c.b
+            x = c.c
+
+            x = c.a
+            x = c.b
+            x = c.c
+
+            c.a = 2
+            c.b = 3
+            c.c = 4
+
+            c.a = 2
+            c.b = 3
+            c.c = 4
+
+            c.a = 2
+            c.b = 3
+            c.c = 4
+
+            c.a = 2
+            c.b = 3
+            c.c = 4
+
+
+            x = c.a
+            x = c.b
+            x = c.c
+
+            x = c.a
+            x = c.b
+            x = c.c
+
+            x = c.a
+            x = c.b
+            x = c.c
+
+            x = c.a
+            x = c.b
+            x = c.c
+
+    def calibrate(self):
+
+        class c:
+            pass
+
+        for i in xrange(self.rounds):
+            pass
+
+class SpecialInstanceAttribute(Test):
+
+    version = 0.3
+    operations = 5*(12 + 12)
+    rounds = 100000
+
+    def test(self):
+
+        class c:
+            pass
+        o = c()
+
+        for i in xrange(self.rounds):
+
+            o.__a__ = 2
+            o.__b__ = 3
+            o.__c__ = 4
+
+            o.__a__ = 2
+            o.__b__ = 3
+            o.__c__ = 4
+
+            o.__a__ = 2
+            o.__b__ = 3
+            o.__c__ = 4
+
+            o.__a__ = 2
+            o.__b__ = 3
+            o.__c__ = 4
+
+
+            x = o.__a__
+            x = o.__b__
+            x = o.__c__
+
+            x = o.__a__
+            x = o.__b__
+            x = o.__c__
+
+            x = o.__a__
+            x = o.__b__
+            x = o.__c__
+
+            x = o.__a__
+            x = o.__b__
+            x = o.__c__
+
+            o.__a__ = 2
+            o.__b__ = 3
+            o.__c__ = 4
+
+            o.__a__ = 2
+            o.__b__ = 3
+            o.__c__ = 4
+
+            o.__a__ = 2
+            o.__b__ = 3
+            o.__c__ = 4
+
+            o.__a__ = 2
+            o.__b__ = 3
+            o.__c__ = 4
+
+
+            x = o.__a__
+            x = o.__b__
+            x = o.__c__
+
+            x = o.__a__
+            x = o.__b__
+            x = o.__c__
+
+            x = o.__a__
+            x = o.__b__
+            x = o.__c__
+
+            x = o.__a__
+            x = o.__b__
+            x = o.__c__
+
+            o.__a__ = 2
+            o.__b__ = 3
+            o.__c__ = 4
+
+            o.__a__ = 2
+            o.__b__ = 3
+            o.__c__ = 4
+
+            o.__a__ = 2
+            o.__b__ = 3
+            o.__c__ = 4
+
+            o.__a__ = 2
+            o.__b__ = 3
+            o.__c__ = 4
+
+
+            x = o.__a__
+            x = o.__b__
+            x = o.__c__
+
+            x = o.__a__
+            x = o.__b__
+            x = o.__c__
+
+            x = o.__a__
+            x = o.__b__
+            x = o.__c__
+
+            x = o.__a__
+            x = o.__b__
+            x = o.__c__
+
+            o.__a__ = 2
+            o.__b__ = 3
+            o.__c__ = 4
+
+            o.__a__ = 2
+            o.__b__ = 3
+            o.__c__ = 4
+
+            o.__a__ = 2
+            o.__b__ = 3
+            o.__c__ = 4
+
+            o.__a__ = 2
+            o.__b__ = 3
+            o.__c__ = 4
+
+
+            x = o.__a__
+            x = o.__b__
+            x = o.__c__
+
+            x = o.__a__
+            x = o.__b__
+            x = o.__c__
+
+            x = o.__a__
+            x = o.__b__
+            x = o.__c__
+
+            x = o.__a__
+            x = o.__b__
+            x = o.__c__
+
+            o.__a__ = 2
+            o.__b__ = 3
+            o.__c__ = 4
+
+            o.__a__ = 2
+            o.__b__ = 3
+            o.__c__ = 4
+
+            o.__a__ = 2
+            o.__b__ = 3
+            o.__c__ = 4
+
+            o.__a__ = 2
+            o.__b__ = 3
+            o.__c__ = 4
+
+
+            x = o.__a__
+            x = o.__b__
+            x = o.__c__
+
+            x = o.__a__
+            x = o.__b__
+            x = o.__c__
+
+            x = o.__a__
+            x = o.__b__
+            x = o.__c__
+
+            x = o.__a__
+            x = o.__b__
+            x = o.__c__
+
+    def calibrate(self):
+
+        class c:
+            pass
+        o = c()
+
+        for i in xrange(self.rounds):
+            pass
+
+class NormalInstanceAttribute(Test):
+
+    version = 0.3
+    operations = 5*(12 + 12)
+    rounds = 100000
+
+    def test(self):
+
+        class c:
+            pass
+        o = c()
+
+        for i in xrange(self.rounds):
+
+            o.a = 2
+            o.b = 3
+            o.c = 4
+
+            o.a = 2
+            o.b = 3
+            o.c = 4
+
+            o.a = 2
+            o.b = 3
+            o.c = 4
+
+            o.a = 2
+            o.b = 3
+            o.c = 4
+
+
+            x = o.a
+            x = o.b
+            x = o.c
+
+            x = o.a
+            x = o.b
+            x = o.c
+
+            x = o.a
+            x = o.b
+            x = o.c
+
+            x = o.a
+            x = o.b
+            x = o.c
+
+            o.a = 2
+            o.b = 3
+            o.c = 4
+
+            o.a = 2
+            o.b = 3
+            o.c = 4
+
+            o.a = 2
+            o.b = 3
+            o.c = 4
+
+            o.a = 2
+            o.b = 3
+            o.c = 4
+
+
+            x = o.a
+            x = o.b
+            x = o.c
+
+            x = o.a
+            x = o.b
+            x = o.c
+
+            x = o.a
+            x = o.b
+            x = o.c
+
+            x = o.a
+            x = o.b
+            x = o.c
+
+            o.a = 2
+            o.b = 3
+            o.c = 4
+
+            o.a = 2
+            o.b = 3
+            o.c = 4
+
+            o.a = 2
+            o.b = 3
+            o.c = 4
+
+            o.a = 2
+            o.b = 3
+            o.c = 4
+
+
+            x = o.a
+            x = o.b
+            x = o.c
+
+            x = o.a
+            x = o.b
+            x = o.c
+
+            x = o.a
+            x = o.b
+            x = o.c
+
+            x = o.a
+            x = o.b
+            x = o.c
+
+            o.a = 2
+            o.b = 3
+            o.c = 4
+
+            o.a = 2
+            o.b = 3
+            o.c = 4
+
+            o.a = 2
+            o.b = 3
+            o.c = 4
+
+            o.a = 2
+            o.b = 3
+            o.c = 4
+
+
+            x = o.a
+            x = o.b
+            x = o.c
+
+            x = o.a
+            x = o.b
+            x = o.c
+
+            x = o.a
+            x = o.b
+            x = o.c
+
+            x = o.a
+            x = o.b
+            x = o.c
+
+            o.a = 2
+            o.b = 3
+            o.c = 4
+
+            o.a = 2
+            o.b = 3
+            o.c = 4
+
+            o.a = 2
+            o.b = 3
+            o.c = 4
+
+            o.a = 2
+            o.b = 3
+            o.c = 4
+
+
+            x = o.a
+            x = o.b
+            x = o.c
+
+            x = o.a
+            x = o.b
+            x = o.c
+
+            x = o.a
+            x = o.b
+            x = o.c
+
+            x = o.a
+            x = o.b
+            x = o.c
+
+    def calibrate(self):
+
+        class c:
+            pass
+        o = c()
+
+        for i in xrange(self.rounds):
+            pass
+
+class BuiltinMethodLookup(Test):
+
+    version = 0.3
+    operations = 5*(3*5 + 3*5)
+    rounds = 70000
+
+    def test(self):
+
+        l = []
+        d = {}
+
+        for i in xrange(self.rounds):
+
+            l.append
+            l.append
+            l.append
+            l.append
+            l.append
+
+            l.insert
+            l.insert
+            l.insert
+            l.insert
+            l.insert
+
+            l.sort
+            l.sort
+            l.sort
+            l.sort
+            l.sort
+
+            d.has_key
+            d.has_key
+            d.has_key
+            d.has_key
+            d.has_key
+
+            d.items
+            d.items
+            d.items
+            d.items
+            d.items
+
+            d.get
+            d.get
+            d.get
+            d.get
+            d.get
+
+            l.append
+            l.append
+            l.append
+            l.append
+            l.append
+
+            l.insert
+            l.insert
+            l.insert
+            l.insert
+            l.insert
+
+            l.sort
+            l.sort
+            l.sort
+            l.sort
+            l.sort
+
+            d.has_key
+            d.has_key
+            d.has_key
+            d.has_key
+            d.has_key
+
+            d.items
+            d.items
+            d.items
+            d.items
+            d.items
+
+            d.get
+            d.get
+            d.get
+            d.get
+            d.get
+
+            l.append
+            l.append
+            l.append
+            l.append
+            l.append
+
+            l.insert
+            l.insert
+            l.insert
+            l.insert
+            l.insert
+
+            l.sort
+            l.sort
+            l.sort
+            l.sort
+            l.sort
+
+            d.has_key
+            d.has_key
+            d.has_key
+            d.has_key
+            d.has_key
+
+            d.items
+            d.items
+            d.items
+            d.items
+            d.items
+
+            d.get
+            d.get
+            d.get
+            d.get
+            d.get
+
+            l.append
+            l.append
+            l.append
+            l.append
+            l.append
+
+            l.insert
+            l.insert
+            l.insert
+            l.insert
+            l.insert
+
+            l.sort
+            l.sort
+            l.sort
+            l.sort
+            l.sort
+
+            d.has_key
+            d.has_key
+            d.has_key
+            d.has_key
+            d.has_key
+
+            d.items
+            d.items
+            d.items
+            d.items
+            d.items
+
+            d.get
+            d.get
+            d.get
+            d.get
+            d.get
+
+            l.append
+            l.append
+            l.append
+            l.append
+            l.append
+
+            l.insert
+            l.insert
+            l.insert
+            l.insert
+            l.insert
+
+            l.sort
+            l.sort
+            l.sort
+            l.sort
+            l.sort
+
+            d.has_key
+            d.has_key
+            d.has_key
+            d.has_key
+            d.has_key
+
+            d.items
+            d.items
+            d.items
+            d.items
+            d.items
+
+            d.get
+            d.get
+            d.get
+            d.get
+            d.get
+
+    def calibrate(self):
+
+        l = []
+        d = {}
+
+        for i in xrange(self.rounds):
+            pass
+