[pypy-svn] r74425 - pypy/extradoc/talk/pycon-italy-2010/talk

[antocuni at codespeak.net]

Author: antocuni
Date: Thu May  6 18:45:46 2010
New Revision: 74425

Modified:
   pypy/extradoc/talk/pycon-italy-2010/talk/talk.txt
Log:
add the slides about part 3



Modified: pypy/extradoc/talk/pycon-italy-2010/talk/talk.txt
==============================================================================
--- pypy/extradoc/talk/pycon-italy-2010/talk/talk.txt	(original)
+++ pypy/extradoc/talk/pycon-italy-2010/talk/talk.txt	Thu May  6 18:45:46 2010
@@ -39,8 +39,6 @@
 
 - What's new and status update
 
-- Mandelbrot demo
-
 
 What's new in PyPy 1.2
 -----------------------
@@ -69,6 +67,20 @@
 .. image:: pypy-vs-psyco.png
    :scale: 35
 
+Speed: Demo
+-----------
+
+- Django application
+
+- Mandelbrot fractal
+
+  * fished randomly on the net :-)
+
+- Run both on CPython and PyPy
+
+  * django trunk!
+
+
 
 What works on PyPy
 -------------------
@@ -254,5 +266,129 @@
 Part 3
 ------
 
-Demo explained
+How to use PyPy right now
+
+
+Mandelbrot demo
+---------------
+
+- Works purely on PyPy
+
+- Not always the case
+
+  * missing extension modules (cpyext mitigates the problem)
+
+  * libraries that rely on CPython details
+    
+  * ...
+
+- clear performance-critical part
+
+
+CPython and PyPy side by side
+------------------------------
+
+- CPython: runs the main application
+
+- PyPy: subprocess, runs only the hotspots
+
+- How do they communicate?
+
+- execnet
+
+  * **The Ring of Python**, Holger Krekel, 9:00
+
+  * oups, too late :-)
+
+
+Rendering (1)
+---------------
+
+|example<| Mandelbrot |>|
+|small|
+::
+
+    def render(request):
+        w = int(request.GET.get('w', 320))
+        h = int(request.GET.get('h', 240))
+
+        from py_mandel import mandelbrot
+        img = mandelbrot(w, h)
+
+        return HttpResponse(img, content_type="image/bmp")
+
+|end_small|
+|end_example|
+
+
+Rendering (2)
+-------------
+
+|example<| Mandelbrot on PyPy |>|
+|small|
+::
+
+    def pypy_render(request):
+        w = int(request.GET.get('w', 320))
+        h = int(request.GET.get('h', 240))
+
+        channel = pypy.remote_exec("""
+            from py_mandel import mandelbrot
+            w, h = channel.receive()
+            img = mandelbrot(w, h)
+            channel.send(img)
+        """)
+        channel.send((w, h))
+        img = channel.receive()
+
+        return HttpResponse(img, content_type="image/bmp")
+
+|end_small|
+|end_example|
+
+execnet setup
+-------------
+
+|example<| At startup |>|
+|small|
+::
+
+    import execnet
+    mygroup = execnet.Group()
+    pypy = mygroup.makegateway("popen//python=pypy-c")
+    pypy.remote_exec("""
+        import sys
+        import os
+        os.chdir("mandelbrot")
+        sys.path.insert(0, '')
+    """)
+
+|end_small|
+|end_example|
+
+
+Demo
+----
+
+
+Benchmarks
+----------
+
+.. image:: demo-graph.pdf
+   :scale: 45
+
+
+Contact / Q&A 
+--------------
+
+* Antonio Cuni: at http://merlinux.eu
+
+* Armin Rigo: arigo (at) tunes.org
+
+* Links:
+
+  -  PyPy: http://www.pypy.org
+
+  - PyPy speed center: http://speed.pypy.org/
 
+  - Blog: http://morepypy.blogspot.com