The document is an agenda for a Java performance seminar to be held on June 18, 2009 at the Daniel Hotel in Herzelia. The seminar will cover topics including the history of JVM optimizations from early interpreted bytecodes to modern just-in-time compilation and garbage collection. It will also discuss identifying and solving performance issues using tools like VisualVM, profiling techniques, and programming tips. Later sessions will focus on JVM optimizations, garbage collection, compiler optimizations, and using distributed JVMs and clustering solutions to improve performance.

1. Java Performance
Seminar
Daniel Hotel, Herzelia
08:30-14:00 18/6/2009

2. Introduction
2

3. Introduction
• Why Performance?
• Critical
• Underestimated
• Overlooked
• Put off
3

4. Introduction
• Taming the beast
• Avoidance
• Awareness
• Planning ahead
• Identification
• Monitoring
• Profiling
• Solving
• Tuning
• Optimizations
4

5. History
5

6. History
• Early JVM
• Interpreted bytecodes
6

7. History
• First Just-in-time compilation
• JIT combines the advantages of
interpretation and static (ahead-of-
time) compilation.
7

8. History
• Generational GC
• Replaces naïve mark and sweep
8

9. History
• HotSpot JIT compilation
• Analyzes the program's performance for
"hot spots“
• Targets for optimization
9

10. History
• Features
• New I/O
• 64-Bit JVM Support
• Garbage Collection Policy
10

11. History
• Features
• Class Data Sharing
• Ergonomics
11

12. History
• Features
• Split bytecode verification
• Escape analysis and lock coarsening
12

13. History
• Features
• Java Quick Starter
13

14. History
• Java 7
• G1 – Garbage First
• Multi Core Parallel Computing
• Client+Server compilers in same session
14

15. Agenda
15

16. The JVM Magic
• JVM Optimizations
• Garbage Collection Overview
• Compiler (javac / JIT) Optimizations
• Programming and tuning tips
16

17. JDK tools for performance diagnostics
• Visual Monitoring Tools
• Identify and solve problems using
• VisualVM
• Btrace
• jHat
17

18. Riding the memory bus
• Distributed JVM
• Overcome disk and network access
scalability bottlenecks
• Strategies for using RAM efficiently
• Terracotta’s clustering solution
18

19. The Experts Panel
• Any Questions?
• Submit your performance questions until the
last lecture
• Hit AlphaCSP’s Experts Panel with your
questions
19