Invited Talk at TU Dortmund

Transcript

1. Martin Lippert, Spring Tools Lead & Sustainability Ambassador @ VMware June 2023 Invited Talk TU Dortmund
2. Why are you here?
3. Who am I ?
4. Software Engineer
5. Spring Tools Lead
7. VMware Apple Google Xerox PARC Stanford University Meta Intel Tesla
8. How I started
9. Schneider CPC 664 Z80 processor @ 4Mhz, 64 KB RAM https://de.wikipedia.org/wiki/Amstrad_CPC#/media/Datei:Schneider_664_en.jpg 1985
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
11. Atari TT 030 Motorola 68030 processor @ 32Mhz, 4 MB RAM https://de.wikipedia.org/wiki/Atari_TT#/media/Datei:Atari_TT030.JPG
12. Apple Power Macintosh 6100 PowerPC 601 @ 60Mhz, max 72 MB RAM MIKI Yoshihito - https://www. fl ickr.com/photos/mujitra/13981566927/
13. On the software side?
15. Today
16. Software is everywhere
17. Software changes the world
18. How to develop truly great software?
19. Structure
20. Design Patterns Elements of Reusable
 Object-Oriented Software by Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides
21. Refactoring Improving the Design of Existing Code by Martin Fowler
22. Feedback Cycles
23. JUnit
24. Test-Driven Development
25. Test Driven Development By Example by Kent Beck
26. User Feedback
27. "Real Artists Ship" Steve Jobs
28. Agile Software Development
29. Extreme Programming Explained by Kent Beck
30. Distributed Systems
31. APIs and Evolution
32. Eat Your Own Dogfood
33. Test at scale
34. "Hello World" always work
35. Massive amounts of data
36. public long calculate(List<Order> orders) { long sum = 0; for(int i = 0; i < orders.size(); i++) { sum += orders.get(i).getPrice(); } return sum; } What is the problem here?
37. Complexity Matters
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
39. "software is getting slower more rapidly than hardware is becoming faster" Wirth’s Law
40. Back to the beginning
41. Running on Motorola 68030 processor @ 32Mhz, 4 MB RAM
42. What comes next?
43. Vulnerabilities CVEs are now part of your daily life
44. GenAI (probably more ML + LLM than intelligence)
45. Decarbonization super important
46. "The best way to predict the future is to invent it" Alan Kay
47. Thank You for listening Martin Lippert @martinlippert