1. Tradeoffs of Replacing Core
Components
Andy Dai
andy@dorm7.com
Django Workshop 2014/1/21

2. SHOULD I SWAP OUT
DJANGO TEMPLATE/ORM?

3. DON’T DO IT!

4. WAIT! NOT REALLY!
IT’S WORTH IF…

5. YOU ARE OKAY WITH SACRIFICING
ABILITY TO USE THIRD-PARTY
DJANGO PACKAGES

6. YOU HAVE NO PROBLEM
GIVING UP THE POWERFUL
DJANGO ADMIN

7. YOU HAVE ALREADY ANALYZED YOUR
OWN CODE TO FIND AND FIX THE
ROOT CAUSES OF YOUR PROBLEMS

8. YOU’VE EXPLORED ALL OTHER
OPTIONS INCLUDING CACHING
AND DENORMALIZATION

9. YOU’RE VERY SURE THAT YOU’RE
NOT OPTIMIZING PREMATURELY

10. YOU’RE WILLING TO ACCEPT THE
FACT THAT UPGRADING DJANGO
WILL BE EXTREMELY PAINFUL

11. THINK AGAIN!

12. OK. SO YOU WANT TO USE
DJANGO WITHOUT…

13. “Django Admin”
“Django Template”
“Django ORM”
“Django Third-Party
Packages”

14. AND YOU ADD SOME
PACKAGES…

15. “MongoEngine”
“SQLAlchemy”
“WTForms”
“Jinja2”

16. CONGRATULATION! YOU
GOT FLASK!

17. BUT
ORM/TEMPLATE SUCKS…

18. REPLACE ORM WITH
NOSQL

19. DO NOT DO THIS
GUESS
WEBSITE WILL GROW RAPIDLY

20. IT’S OK IF…

21. YOU HAVE TRIED CACHING,
INDEX, QUERY OPTIMIZATION..

22. YOU KNOW WHAT YOU ARE
DOING

23. REPLACE DJANGO TEMPLATE
WITH JINJA2/MAKO

24. DO NOT DO THIS
LOGIC IN YOUR TEMPLATE

25. IT’S OK IF THERE ARE SOME PAGES
THAT

26. ASK YOURSELF BEFORE
REPLACING DJANGO TEMPLATE

27. “Why you want to do this?”
“Where’s the bottleneck?”
“Cache?”

28. DO IT ONLY WHEN YOU KNOW
WHAT YOU ARE DOING

29. ALWAYS USE THE RIGHT TOOL
FOR THE RIGHT JOB

30. “Premature optimization is the
root of all evil”
– Donald Knuth

31. Django/Jinja2 Integration
•
Jingo - https://github.com/jbalogh/jingo
•
coffin - https://github.com/coffin/coffin/
•
django-jinja - https://github.com/niwibe/django-jinja

32. Replace Django ORM
•
SQLAlchemy - http://www.sqlalchemy.org/
•
MongoEngine - http://mongoengine.org/

33. THANKS!