My slides from my 2009 DjangoCon lightning talk on CPython bytecode.

1. Dive into CPython Bytecode Alex Gaynor

2. I don't need to know that stuff

3. You don't. But it's totally helpful.

4. How does CPython Make Bytecode?

5. Tokenize the source

6. Parse the tokens into an AST

7. Build a symbol table to figure out what's a global

8. Compile to bytecode

9. Now I can haz bytecode

10. Now that I has a bytecode how does I see it?

11. >>> def f(o): ... return o >>> import dis >>> dis.dis(f) 2 0 LOAD_FAST 0 (o) 3 RETURN_VALUE

12. So use the dis module

13. So now that we have bytecode, what do we do with it?

14. Well, what are those bytecodes?

16. Python VM is stack based

17. So now we know some bytecodes, what can we do with this knowledge

21. Less Bytecode == faster!

22. More specialized bytecodes == faster

23. @alex_gaynor Thanks