[pypy-commit] extradoc extradoc: some more examples

[fijal]

Author: Maciej Fijalkowski <fijall at gmail.com>
Branch: extradoc
Changeset: r4118:ca428ddeb6f8
Date: 2012-03-04 12:51 -0800
http://bitbucket.org/pypy/extradoc/changeset/ca428ddeb6f8/

Log:	some more examples

diff --git a/talk/pycon2012/tutorial/examples/00_examples.py b/talk/pycon2012/tutorial/examples/00_examples.py
new file mode 100644
--- /dev/null
+++ b/talk/pycon2012/tutorial/examples/00_examples.py
@@ -0,0 +1,6 @@
+
+def f(a, b):
+    return a + b
+
+import dis
+dis.dis(f)
diff --git a/talk/pycon2012/tutorial/examples/05_obj_vs_dict.py b/talk/pycon2012/tutorial/examples/05_obj_vs_dict.py
new file mode 100644
--- /dev/null
+++ b/talk/pycon2012/tutorial/examples/05_obj_vs_dict.py
@@ -0,0 +1,44 @@
+
+class A(object):
+    def __init__(self, a, b, c):
+        self.a = a
+        self.b = b
+        self.c = c
+
+def obj_good():
+    a = A(1, 2, 3)
+    s = 0
+    for i in range(SIZE):
+        s += a.a + a.b + a.c
+    return s
+
+def obj_bad():
+    a = A(1, 2, 3)
+    s = 0
+    for i in range(SIZE):
+        a.__dict__[i] = i
+        s += a.__dict__[i]
+    return s
+
+def dict_bad():
+    a = {'a': 1, 'b': 2, 'c': 3}
+    s = 0
+    for i in range(SIZE):
+        s += a['a'] + a['b'] + a['c']
+    return s
+
+def dict_good():
+    a = {}
+    s = 0
+    for i in range(SIZE):
+        a[i] = i
+        s += a[i]
+    return s
+
+import timeit
+SIZE = 10000
+
+print "obj, few", timeit.timeit(obj_good, number=SIZE)
+print "obj, many", timeit.timeit(obj_bad, number=SIZE)
+print "dict, many", timeit.timeit(dict_good, number=SIZE)
+print "dict, few", timeit.timeit(dict_bad, number=SIZE)
diff --git a/talk/pycon2012/tutorial/examples/06_specialized.py b/talk/pycon2012/tutorial/examples/06_specialized.py
new file mode 100644
--- /dev/null
+++ b/talk/pycon2012/tutorial/examples/06_specialized.py
@@ -0,0 +1,7 @@
+
+def f():
+    for i in range(10000):
+        l = [k for k in range(10000)]
+        #l.append(None)
+
+f()
diff --git a/talk/pycon2012/tutorial/slides.rst b/talk/pycon2012/tutorial/slides.rst
--- a/talk/pycon2012/tutorial/slides.rst
+++ b/talk/pycon2012/tutorial/slides.rst
@@ -192,7 +192,7 @@
 Specialized lists
 =================
 
-* XXX Example of how much speedup you get out of not mixing
+* xxx
 
 Itertools abuse
 ===============