Garden City Rubyconf 2015 Keynote: Race Condition

A talk on habits, programming and motorcycles (closing Keynote, Garden City Ruby Conf 2015)

Transcript

1. RACE
   CONDITION
   habits, programming
   
   &
   
   motorcycles
   

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2. @niranjan_p
   Niranjan Paranjape
   Founding Partner & CTO
   
   C42 Engineering
   achamian
   

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3. @ponnappa
   Sidu Ponnappa
   Founding Partner & CEO
   
   C42 Engineering
   kaiwren
   

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7. Yamaha R15
   

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8. KTM RC390
   

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9. Triumph Daytona 675R
   

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11. Don’t Panic
    

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12. There Are Two Kinds Of
    Programmers
    those who live in fear and those who don’t
    

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13. Fear Makes You Slow
    

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14. Fear Makes You Avoid Change
    

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15. Fear Causes Panic
    

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16. Panic Causes Mistakes
    

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17. You Don’t Learn When Panicked
    

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18. Your Mind is the Bottleneck
    not your bike
    

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19. Push Yourself to Go Faster
    …but without causing a panic attack every five minutes
    

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20. Do Not Trust
    Your Instincts
    

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21. Your Human Instincts Are Wrong
    (especially in a new context)
    

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22. Copy-Paste Oriented
    Development
    

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23. Crunch Mode: Stop Writing Tests
    

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24. Fat Controller Skinny Model
    

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25. Hot Fix on Production
    

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26. Default Instincts Need Re-training
    

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28. Panic Braking
    (destabilises the bike)
    

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29. Chopping Throttle
    (when getting on the gas is the right thing to do)
    

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30. Your Strongest Instincts Will
    Work Against You
    (they may even cause you to crash)
    

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31. Understand and Compensate for
    Survival Reactions
    (panic is the enemy)
    

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32. You Improve
    What You
    Measure
    

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33. We All Track Metrics
    code coverage, cyclomatic complexity, velocity…
    

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34. Measurements Introduce Biases
    loc as a productivity metric #fail
    

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35. Areas of Interest Create Biases
    beautifully architected codebase, no working code #fail
    

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36. Measure Everything You Can
    lap times, sector times, rpm, gearing…
    

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37. Train One Metric at a Time
    it’s hard to improve in two areas simultaneously at 100+ kmph
    

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38. Local Maxima != Global Maxima
    sometimes improving one corner reduces overall lap times
    

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39. Focus Is A
    Currency
    

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40. You Never Fix Two Bugs at the
    Same Time
    juggling is for jugglers
    

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41. You Always Prefer Fine Grained
    Abstractions
    decoupling help you think more clearly
    

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42. You Hate Side Effects
    because side effects cause bugs
    

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43. You Are Always Quicker When
    the Architecture is Well
    Understood
    fewer decisions, more time to think about each of them
    

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44. You Are Always Quicker With A
    Comprehensive Spec Suite
    you don’t have to evaluate side effects in your head, so fewer
    decisions
    

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45. Focus is a Currency
    and everyone has a finite budget
    

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46. You Spend Focus When You
    Make Decisions
    so you want to save up for important decisions
    

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47. You Spend Focus When You
    Make Decisions
    and everyone has a finite budget
    

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48. Habits Save On Trivial Decision
    Making
    all you need to do is practice
    

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50. Go Slow To Go
    Fast
    

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51. Overall Consistency Trumps Spot
    Performance
    frequent death marches slow you down
    

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52. We Know Learning Takes Time
    

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53. But Not Learning Takes Longer
    

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54. We Know Katas are Valuable
    

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55. We Treat these as Investments
    we trade spot performance in the short-term for consistent
    performance in the long-term
    

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56. CONSISTENCY
    

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57. CONSISTENCY
    

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58. Be an Investor
    invest the time it takes to get better
    

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59. Investments Take Time to Mature
    don’t be impatient, you will go slower
    

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60. Invest in Practice
    practice common decisions through drills to save focus
    

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61. Drills
    throttle control, braking, counter steering, lines…
    

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62. Define Your
    Product
    

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63. We Understand the Importance
    of Clear Requirements
    

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64. We Use Tools like User Stories
    

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65. We Value Clear Acceptance
    Criteria
    

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66. Knowing Desired Outcomes
    Reduces Errors
    

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67. Define the Product
    for every corner
    

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68. Clarify the Tradeoffs
    easy to unintentionally trade entry speed for exit speed
    

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69. Tune your Markers
    markers are essential to optimising your cornering
    

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70. Know Your
    Environment
    

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71. Picking the Right Tools Matters
    ruby for number crunching
    
    cobol for web applications
    

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72. We Constantly Optimize Our
    Development Environments
    OS, shell, editor, IDE, macros…
    

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73. We Constantly Tune Our
    Configurations
    dotfiles
    

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74. We Know Our Projects
    
    Inside-Out
    architecture, domain, ops
    

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75. Choose Your Kit
    

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76. Motorcycles are More Specialized
    than we Think
    

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77. Track Bikes are Heavily
    Optimized
    posture, handling, comfort, storage, range, mileage, power
    delivery, braking
    

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78. Non-Track Bikes are a Bad Idea
    ok for MVP, but not to scale
    

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79. Customize Your Bike Further To
    Suit
    adjust brakes, lever play, suspension, gearing etc. to your needs
    

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80. Know Your Track
    surface, camber, corners, lines
    

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81. Hack Your
    Habits
    

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82. Instincts can be hacked
    turn a disadvantage into a strength
    

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83. You Go Where You Look
    measure loc, you get loc
    
    measure customer focus, you get customer focus
    

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84. Target Fixation
    

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85. You Literally Go Where You Look
    use this to go faster, not just avoid crashes
    

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86. When You’re Going
    Down, You’re
    Going Down
    

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87. High Side
    

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88. PHOTO CREDITS
    Raniel Diaz, https://flic.kr/p/cGsPDY
    
    !
    Pair Programming, http://commons.wikimedia.org/
    wiki/File:Pair_programming_1.jpg
    
    !
    Lorenzo crashes out of the lead of the Valencia
    MotoGP. Source, Alberto Siz / AP
    

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89. Q & A
    @niranjan_p
    Niranjan Paranjape
    Founding Partner & CTO
    
    C42 Engineering
    achamian
    @ponnappa
    Sidu Ponnappa
    Founding Partner & CEO
    
    C42 Engineering
    kaiwren
    

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