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Mastering the Java Virtual Machine

You're reading from   Mastering the Java Virtual Machine An in-depth guide to JVM internals and performance optimization

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Product type Paperback
Published in Feb 2024
Publisher Packt
ISBN-13 9781835467961
Length 234 pages
Edition 1st Edition
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Author (1):
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Otavio Santana Otavio Santana
Author Profile Icon Otavio Santana
Otavio Santana
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Table of Contents (19) Chapters Close

Preface 1. Part 1: Understanding the JVM
2. Chapter 1: Introduction to the Java Virtual Machine FREE CHAPTER 3. Chapter 2: Class File Structure 4. Chapter 3: Understanding Bytecodes 5. Part 2: Memory Management and Execution
6. Chapter 4: Execution Engine 7. Chapter 5: Memory Management 8. Chapter 6: Garbage Collection and Memory Profiling 9. Part 3: Alternative JVMs
10. Chapter 7: GraalVM 11. Chapter 8: The JVM Ecosystem and Alternative JVMs 12. Part 4: Advanced Java Topics
13. Chapter 9: Java Framework Principles 14. Chapter 10: Reflection 15. Chapter 11: Java Annotation Processor 16. Chapter 12: Final Considerations 17. Index 18. Other Books You May Enjoy

Execution Engine

In the intricate landscape of the Java Virtual Machine (JVM), the execution engine takes center stage, playing a pivotal role in interpreting bytecode and executing just-in-time (JIT) compilation for performance optimization. Bytecode, the intermediary language between Java source code and the JVM, undergoes interpretation as the execution engine dynamically translates it into native machine code during program execution. The stack-based execution model employed by the JVM manipulates an operand stack, pushing and popping operands as bytecode instructions are interpreted. While bytecode interpretation ensures platform independence, it cannot consistently deliver peak performance due to an additional abstraction layer.

To address performance challenges, the JVM incorporates JIT compilation. This strategic optimization technique identifies frequently executed code segments, or hotspots, and dynamically compiles them into native machine code at runtime. By selectively...

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