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Euro python2011 High Performance Python

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Ian Ozsvald
Ian Ozsvald

I ran this as a 4 hour tutorial at EuroPython 2011 to teach High Performance Python coding. Techniques covered include bottleneck analysis by profiling, bytecode analysis, converting to C using Cython and ShedSkin, use of the numerical numpy library and numexpr, multi-core and multi-machine parallelisation and using CUDA GPUs. Write-up with 49 page PDF report: http://ianozsvald.com/2011/06/29/high-performance-python-tutorial-v0-1-from-my-4-hour-tutorial-at-europython-2011/

Technology
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High Performance Computing with Python (4 hour tutorial) EuroPython 2011
Goal ,[object Object],[object Object],[object Object],[object Object]
Get the source please! ,[object Object],[object Object],[object Object],[object Object]
About me (Ian Ozsvald) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Overview (pre-requisites) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
We won't be looking at... ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Something to consider ,[object Object],[object Object],[object Object],[object Object],[object Object]
What can we expect? ,[object Object],[object Object],[object Object],[object Object],[object Object]
Practical result - PANalytical
Mandelbrot results (Desktop i3)
Our code ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Profiling bottlenecks ,[object Object],[object Object],[object Object],[object Object]
cProfile output ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RunSnakeRun
Let's profile python.py ,[object Object],[object Object],[object Object]
What's the problem? ,[object Object],[object Object],[object Object]
line_profiler.py ,[object Object],[object Object]
kernprof.py output ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Dereferencing is slow ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
We have faster code ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
PyPy 1.5 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Cython ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Cython on pure_python_2.py ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Cython types ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Compiler directives ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ShedSkin ,[object Object],[object Object],[object Object],[object Object],[object Object]
Easy to use ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
numpy vectors ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Vector outline... ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Profiling some more ,[object Object],[object Object],[object Object],[object Object],[object Object]
Cache sizes ,[object Object],[object Object],[object Object],[object Object]
Speed vs cache size (Core2/i3)
NumExpr ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
numpy and iteration ,[object Object],[object Object],[object Object],[object Object],[object Object]
Cython on numpy_loop.py ,[object Object],[object Object],[object Object],[object Object],[object Object]
multiprocessing ,[object Object],[object Object],[object Object],[object Object]
multiprocessing Pool ,[object Object],[object Object],[object Object],[object Object],[object Object]
Making chunks of work ,[object Object],[object Object],[object Object],[object Object]
Code outline ,[object Object],[object Object],[object Object],[object Object],[object Object]
ParallelPython ,[object Object],[object Object],[object Object],[object Object],[object Object]
ParallelPython + binaries ,[object Object],[object Object],[object Object],[object Object]
Challenge... ,[object Object],[object Object],[object Object],[object Object]
pyCUDA ,[object Object],[object Object],[object Object],[object Object]
pyCUDA demos ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Birds of Feather? ,[object Object],[object Object],[object Object],[object Object]
Future trends ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Bits to consider ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Feedback ,[object Object],[object Object],[object Object],[object Object]

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