Stack Overflow - it's all about performance

Transcript

1. Marco Cecconi @sklivvz http://sklivvz.com

2. ARCHITECTURE? WHAT THE HECK IS THAT?

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5. Grew to 130 sites (+20%) Global site rank went from

   #56 to #44 (-12)
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7. *source: Quantcast, Alexa #50-­‐ish  network  for  traffic*   (between imdb.com

   and t.co)
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21. http://stackexchange.com/performance

22. Agile  

23. BAT!CAVE Code-build-test cycle running on home machine feature requests

24. BAT!CAVE DEV.SO Test on the real servers git push

25. BAT!CAVE DEV.SO META.SE 1-click deploy Users test on meta.stackexchange.com (“baking”)

    git push

26. BAT!CAVE DEV.SO META.SE 1-click deploy HALP! git revert git push

27. BAT!CAVE DEV.SO NETWORK META.SE 1-click deploy git push 1-click deploy

    It’s live! Tons of users use it…

28. BAT!CAVE DEV.SO NETWORK META.SE 1-click deploy git push 1-click deploy

    …and provide new feature requests

29. Move  fast  and  break  things*   * Not the home

    page or question page :-)

30. Move  fast  and  break  things*   * Not the home

    page or question page :-)

31. Abusing  caching  

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35. Our  frienemy:   The  Garbage  Collector  

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42. Cache abuse to help GC

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45. Compiler abuse to help GC

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50. IRepository<Order>  orderRepository  =            container.Resolve<IRepository<Order>>();  

      Order  order  =  orderRepository.Get(35); Ye olde dependency injection
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52. IRepository<Order>  repository  =      new  ValidatingOrderRepository  (    

         new  SecurityRepository<Order>  (              new  LoggingRepository<Order>  (                  new  CachingRepository<Order>  (                      new  NHibernateRepository<Order>  ()                  )              )          )      );         Order  order  =  repository.Get(35);

53. Our  source  code  

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60. YAGNI*   * You Ain’t Gonna Need It!

61. Libraries  and  open  source  

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65. Wrap  code  in  libraries     and  open  source  it

     
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68. “SUPERHERO” CODING

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70. TOOLS LEVEL: “NINJA”

71. •     Performance  is  a  feature   •     Always.

     Be.  Shipping.   •     Use  your  circumstances.   •     Open  source  your  libraries   •     3  obscenely  big  monitors.     KEY TAKEAWAYS
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73. Marco Cecconi @sklivvz http://sklivvz.com we are hiring new ninjas from

    anywhere in the world!