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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

JIT compilation

JIT compilation stands as a pivotal component in the JVM, revolutionizing the execution of Java applications. Unlike traditional ahead-of-time (AOT) compilation, where the entire code is translated into machine code before execution, JIT compilation occurs dynamically during runtime. This on-the-fly translation transforms Java bytecode into native machine code just before execution, optimizing performance and adaptability for the machine it runs on, considering which parts of the code are used the most and need to be optimized. This dynamic optimization process ensures that the JVM focuses on the most frequently executed portions of the code, effectively enhancing performance and adaptability to the specific runtime conditions.

The adoption of JIT compilation within the JVM is rooted in the pursuit of striking a balance between portability and performance. By interpreting bytecode initially and then selectively compiling frequently executed code paths into native...

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