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Java performance: What's the big deal? - Trisha Gee

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It seems that everywhere you look these days people are needing to work on high performance/low latency applications. If they're not already working on them, then they want to be. But what do you …

It seems that everywhere you look these days people are needing to work on high performance/low latency applications. If they're not already working on them, then they want to be. But what do you really need to know when you're working on performance-sensitive systems? Where do you get started? In this session, Trisha outlines things you need to consider when thinking about performance, covers some of the frequently-asked questions, and notes the pitfalls and common traps that developers fall into.

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Transcript

  • 1. Java Performance What’s the big deal? Trisha Gee, Developer @trisha_gee mechanitis.blogspot.comWednesday, 17 October 12
  • 2. Who are you and what do you want?Wednesday, 17 October 12
  • 3. So, performance.... • Where do I start? • Things to consider... • Frequently asked questions • What Not To Do • Questions?Wednesday, 17 October 12
  • 4. Where do I start?Wednesday, 17 October 12
  • 5. Do you really care?Wednesday, 17 October 12
  • 6. Do you care about...? • LatencyWednesday, 17 October 12
  • 7. Do you care about...? • ThroughputWednesday, 17 October 12
  • 8. Do you care about...? • ResponsivenessWednesday, 17 October 12
  • 9. Do you care about...? • StabilityWednesday, 17 October 12
  • 10. Do you care about...? • Restricted hardwareWednesday, 17 October 12
  • 11. NFRs Are Not Evil • 99.99% of all orders processed in less than 10ms • 7000 tweets per second • Pages load in less than 0.1 seconds • Must be able to fail over in less than 10 seconds • 2000 price updates per second with 99% latency of <10msWednesday, 17 October 12
  • 12. LatencyWednesday, 17 October 12
  • 13. LatencyWednesday, 17 October 12
  • 14. ConsiderationsWednesday, 17 October 12
  • 15. Cost / BenefitWednesday, 17 October 12
  • 16. The Real WorldWednesday, 17 October 12
  • 17. Mechanical SympathyWednesday, 17 October 12
  • 18. Testing • “Performance” testing • Load testing • Red Line / Capacity • Stress testingWednesday, 17 October 12
  • 19. Where are your bottlenecks?Wednesday, 17 October 12
  • 20. Planning for the FutureWednesday, 17 October 12
  • 21. Planning for the FutureWednesday, 17 October 12
  • 22. Planning for the FutureWednesday, 17 October 12
  • 23. Planning for the FutureWednesday, 17 October 12
  • 24. Planning for the FutureWednesday, 17 October 12
  • 25. CompromisesWednesday, 17 October 12
  • 26. FAQsWednesday, 17 October 12
  • 27. QuestionsWednesday, 17 October 12
  • 28. Questions • Why Java?Wednesday, 17 October 12
  • 29. Questions • Why Java? • How does technology x compare to technology y?Wednesday, 17 October 12
  • 30. Questions • Why Java? • How does technology x compare to technology y? • How can I run multi-threaded / in parallel?Wednesday, 17 October 12
  • 31. Questions • Why Java? • How does technology x compare to technology y? • How can I run multi-threaded / in parallel? • Can I throw more hardware at it?Wednesday, 17 October 12
  • 32. Questions • Why Java? • How does technology x compare to technology y? • How can I run multi-threaded / in parallel? • Can I throw more hardware at it? • How do I speed up <item out of my control>?Wednesday, 17 October 12
  • 33. Questions • Why Java? • How does technology x compare to technology y? • How can I run multi-threaded / in parallel? • Can I throw more hardware at it? • How do I speed up <item out of my control>? • Where’s my magic bullet?Wednesday, 17 October 12
  • 34. Common PitfallsWednesday, 17 October 12
  • 35. Tune By GutWednesday, 17 October 12
  • 36. Myth Based DevelopmentWednesday, 17 October 12
  • 37. It Works On My MachineWednesday, 17 October 12
  • 38. Misleading MicrobenchmarksWednesday, 17 October 12
  • 39. Profiler Is GodWednesday, 17 October 12
  • 40. More Hardware RequiredWednesday, 17 October 12
  • 41. Too Smart For New HardwareWednesday, 17 October 12
  • 42. Disregarding the Laws of PhysicsWednesday, 17 October 12
  • 43. The Never Ending StoryWednesday, 17 October 12
  • 44. OK fine...Wednesday, 17 October 12
  • 45. Java Stuff • The Garbage Collector Is Not Your Enemy • The JVM Is Smarter Than You • Synchronized Is Evil • Don’t Forget The Machine • ...it might not be your codeWednesday, 17 October 12
  • 46. In SummaryWednesday, 17 October 12
  • 47. In Summary • What is is you really care about? • The real world matters • There is no magic bulletWednesday, 17 October 12
  • 48. Science, Not ArtWednesday, 17 October 12
  • 49. Questions?Wednesday, 17 October 12
  • 50. Resources • We Don’t Need No Stinkin’ Locks! - 3:45pm (now) • Are your GC Logs Speaking to You? 3:45pm (now - typical) • Martin’s Performance Myths presentation • Kirk’s Performance Tuning course • Coding the Architecture • http://is.gd/javaperfWednesday, 17 October 12

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