Why PyPy By Example¶
Authors¶
- Maciej Fijalkowski
- Alex Gaynor
- Armin Rigo
What is PyPy¶
- Can’t convince that they are not crazy
- Python in Python
- No longer speed of interpreter, speed of running program
- Measuring memory is important
Edge Detection¶
- Use dynamic objects with __get__ overridden to act like a list
- Do edge detection on a web cam in real time
- Implemented in Python
- In cPython, ~7 seconds per frame
Tracebin¶
- Successor to JITViewer
- Expose performance information without understanding how PyPy works
Numpy¶
- Believe easier to add numpy to JIT than a JIT to numpy
- Some good initial results, but not complete
Garbage Collection¶
- Don’t have to call free
- History of talk for Pascal
- Everywhere now
Transactional Memory¶
- How do we use multiple cores? * Semaphores, events, etc.
- Multicore usage
- Two times the execution time * Where we were with GC years ago
- Hard work
Sprints¶
- Come sprint on PyPy
- We’ll help with getting projects working on PyPy