Invited Talk at TU Dortmund

Transcript

1. Martin Lippert, Spring Tools Lead & Sustainability Ambassador @ VMware
   June 2023
   Invited Talk
   TU Dortmund
   

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2. Why are you here?
   

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3. Who am I ?
   

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4. Software Engineer
   

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5. Spring Tools Lead
   

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7. VMware
   Apple
   Google
   Xerox PARC
   Stanford University
   Meta
   Intel
   Tesla
   

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8. How I started
   

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9. Schneider CPC 664
   
   Z80 processor @ 4Mhz, 64 KB RAM
   https://de.wikipedia.org/wiki/Amstrad_CPC#/media/Datei:Schneider_664_en.jpg
   1985
   

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10. Atari 1040 ST
    
    Motorola 68000 processor @ 8Mhz, 1024 KB RAM
    @ Bill Bertram, 2006, https://de.wikipedia.org/wiki/Atari_ST#/media/Datei:Atari_1040STf.jpg
    

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11. Atari TT 030
    
    Motorola 68030 processor @ 32Mhz, 4 MB RAM
    https://de.wikipedia.org/wiki/Atari_TT#/media/Datei:Atari_TT030.JPG
    

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12. Apple Power Macintosh 6100
    
    PowerPC 601 @ 60Mhz, max 72 MB RAM
    MIKI Yoshihito - https://www.
    fl
    ickr.com/photos/mujitra/13981566927/
    

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13. On the software side?
    

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15. Today
    

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16. Software is everywhere
    

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17. Software changes the world
    

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18. How to develop
    
    
    truly great software?
    

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19. Structure
    

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20. Design Patterns
    Elements of Reusable

    Object-Oriented Software
    by Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides
    

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21. Refactoring
    Improving the Design of Existing Code
    by Martin Fowler
    

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22. Feedback Cycles
    

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23. JUnit
    

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24. Test-Driven Development
    

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25. Test Driven Development
    By Example
    by Kent Beck
    

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26. User Feedback
    

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27. "Real Artists Ship"
    Steve Jobs
    

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28. Agile Software Development
    

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29. Extreme Programming
    Explained
    by Kent Beck
    

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30. Distributed Systems
    

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31. APIs and Evolution
    

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32. Eat Your Own Dogfood
    

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33. Test at scale
    

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34. "Hello World" always work
    

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35. Massive amounts of data
    

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36. public long calculate(List orders) {
    
    
    long sum = 0;
    
    
    for(int i = 0; i < orders.size(); i++) {
    
    
    sum += orders.get(i).getPrice();
    
    
    }
    
    
    return sum;
    
    
    }
    
    
    What is the problem here?
    

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37. Complexity Matters
    

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38. t(n) = n6 vs. t(n) = 2n
    103 machines in parallel
    109 operations per second
    n = 100
    1s universe doesn’t
    exist long enough
    

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39. "software is getting slower more rapidly
    than hardware is becoming faster"
    Wirth’s Law
    

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40. Back to the beginning
    

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41. Running on
    
    Motorola 68030 processor @ 32Mhz, 4 MB RAM
    

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42. What comes next?
    

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43. Vulnerabilities
    CVEs are now part of your daily life
    

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44. GenAI
    (probably more ML + LLM than intelligence)
    

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45. Decarbonization
    super important
    

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46. "The best way to predict the
    future is to invent it"
    Alan Kay
    

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47. Thank You
    for listening
    
    
    Martin Lippert
    
    
    @martinlippert
    

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