The document discusses hacking and customizing YSlow, a web performance tool, emphasizing the importance of personalizing scores and rules to improve web performance. It outlines steps to create a hackable version and encourages users to contribute by sending patches. The overall message highlights the ease of modifying the tool and the value of individual improvements in web architecture.

1. Hacking YSlow
@stoyanstefanov
http://phpied.com
SF WebPerf Meetup Aug 2, 2012

2. Configuring
Customizing
Extending

3. Messing
Fiddling
Hacking

4. Tool -> Platform

5. Scores

6. Strike of a genius?
Lucky strike?
Marketing plot?

7. How come I get an...

9. Coding horror:
"Yahoo's problems
are not your
problems"

10. Disagree with scores?
Your own CDN?
Expires not important?

11. Customize the scores

12. Customize the rules

13. New rules

14. Remove the owner
bottleneck

15. Lint all the things!

16. Contribute to the
project

17. Written in JS
barrier for entry =
!existent

18. Architecture
1. Peel
2. Lint
3. Show

19. Architecture
1. Peel
2. Lint
3. Show

20. Running your own
hackable copy
(bookmarklet)

21. 1. Git
2. Build
3. Deploy
4. Install client

22. 1. Git (click)
2. Build (make)
3. Deploy (scp)
4. Install client
(drag)

23. Hack:
1. customize
2. extend

24. Hack:
1. customize
YSLOW.registerRuleset()
2. extend

25. Hack:
1. customize
YSLOW.registerRuleset()
2. extend
YSLOW.registerRule()

26. Spread:
* send a patch
* BYO

27. Thanks!