[pypy-commit] extradoc extradoc: Talk for djangocon

[alex_gaynor]

Author: Alex Gaynor <alex.gaynor at gmail.com>
Branch: extradoc
Changeset: r3597:7eeb46762fb7
Date: 2011-06-06 10:24 +0200
http://bitbucket.org/pypy/extradoc/changeset/7eeb46762fb7/

Log:	Talk for djangocon

diff --git a/talk/djangocon.eu2011/Makefile b/talk/djangocon.eu2011/Makefile
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+display:
+	rst2s5.py --current-slide talk.rst talk.html
+	chromium-browser talk.html
diff --git a/talk/djangocon.eu2011/talk.rst b/talk/djangocon.eu2011/talk.rst
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+===============
+Django and PyPy
+===============
+
+Me
+--
+
+ * Django and PyPy core developer
+ * I like making your code faster
+ * Working at Quora making their codebase run on PyPy, fast.
+
+What is Django?
+---------------
+
+...
+
+What is PyPy?
+-------------
+
+ * An implementation of Python 2.7.1
+ * A very fast implementation
+ * A very compliant implementation
+
+What is PyPy? (2)
+-----------------
+
+ * Python written in Python
+ * Open source (MIT licensed)
+ * 8 years old
+ * Over 150,000 lines of test code (that's more than all of Django)
+ * A replacement to Psyco
+
+Fast
+----
+
+ * Faster than CPython on almost every benchmark we have.
+ * http://speed.pypy.org/
+
+World's shortest introduction to JITing
+---------------------------------------
+
+ * Run interpreter
+ * Find frequently executed loops
+ * Turn those loops into efficient assembler, by specializing for the types of variables and other things.
+
+Case studies
+------------
+
+ * Production ready
+ * Real people are using this to speed up their apps.
+
+LWN.net
+-------
+
+ * Parse the output of ``git log`` and generate data/reports
+ * CPython: 63 seconds
+ * PyPy: 21 seconds
+
+Some guy on IRC
+---------------
+
+ * Query PostgreSQL and generate reports.
+ * CPython: 2 minutes
+ * PyPy: 8 seconds
+
+Why isn't everyone using PyPy?
+------------------------------
+
+ * C extensions
+ * C-API tightly coupled to CPython implementation details
+
+Solutions
+---------
+
+ * CPyExt
+ * Pure Python/``ctypes``
+ * Cython (GSOC)
+
+But web apps are I/O bound...
+-----------------------------
+
+ * Eh, maybe they should be, but they often aren't.
+
+The Wild Wild Web (WWW for short)
+---------------------------------
+
+ * To run a Django site you need a handful of things
+ * Web server
+ * Database
+ * Random other libraries (``PIL``, ``lxml``, etc.)
+
+Web server
+----------
+
+ * WSGI
+ * Any pure Python server will do
+ * I like ``gunicorn``, you can use whatever you like
+ * *Not* ``mod_wsgi``
+
+Database
+--------
+
+ * Use any database you like, so long as there's an adapter for it that works with both Django and PyPy!
+
+SQLite
+------
+ * Standard library, just works!
+
+PostgreSQL
+----------
+ * RPython ``psycopg2`` compatible lib, requires compiling your own PyPy
+ * ``pg8000`` and tons of other random libraries, Django doesn't work with them, but if they're pure Python they'll work with other stuff (e.g. SQLAlchemy)
+
+MySQL
+-----
+ * (various expletives censored)
+ * Nothing that works with Django ATM
+ * I'm working on a ``ctypes`` based MySQLdb dropin replacement, hopefully open source soonish.
+
+Oracle
+------
+
+ * We have an RPython ``cx_Oracle``
+ * I know nothing about its status
+
+Other databases
+---------------
+
+ * There are other databases?
+ * Uhh, talk to me later?
+
+Random other libs
+-----------------
+
+ * ``PIL`` - works under CPyExt
+ * ``lxml`` - doesn't work :(
+ * Others - how should I know?  Others isn't very specific.
+
+Benchmarking!
+-------------
+
+ * Lies, damned lies, and statistics!
+ * And benchmarks
+ * Ignore them, you need to test *your* app.
+ * But if you need to convince your boss...
+
+Django template benchmark
+-------------------------
+
+ * Part of the Unladen Swallow benchmark suite
+ * PyPy 1.5: almost 10x faster than CPython
+ * PyPy trunk: almost 12x faster
+
+Rietveld benchmark
+------------------
+
+ * Another part of the Unladen Swallow benchmark suit
+ * PyPy trunk: about 1.35x faster than CPython
+
+Tornado web app
+---------------
+
+ * 2x as many requests per second
+
+PyPy
+----
+
+ * A better platform for developing Python itself
+ * A faster Python for your apps
+
+Questions?
+----------
+
+ * http://alexgaynor.net/
+ * http://pypy.org/
+ * Thank you!
+    * Dank je wel!