Java Performance Companion by Charlie Hunt – Master Java Performance Tuning with G1 Garbage Collector and HotSpot VM Ser

Introduction

In the fast-evolving world of enterprise software, performance remains the bedrock of user satisfaction and system reliability. Java Performance Companion by Charlie Hunt is a definitive guide for developers and architects who want to push Java applications to their peak efficiency. Published by Addison-Wesley Professional, this hardcover edition is an indispensable resource for Indian programmers working with modern multicore hardware and complex operating environments.

Book Overview

This book is the natural successor to the classic Java Performance by Hunt and Binu John. It zeroes in on two groundbreaking Java platform innovations: the Garbage First (G1) garbage collector and the HotSpot VM Serviceability Agent. Rather than rehashing basics, the book dives deep into practical, real-world strategies for diagnosing and resolving performance bottlenecks. It is written for professionals who already have a working knowledge of Java and want to move beyond surface-level tuning.

Key Highlights

• Exclusive focus on G1 GC: Understand how G1 overcomes the limitations of parallel, serial, and CMS garbage collectors.
• Hands-on insights: Learn to interpret garbage collection logs, analyze heap dumps, and use the Serviceability Agent for low-level debugging.
• Real-world case studies: The authors share battle-tested tips from years of performance consulting at Oracle and other leading firms.
• Hardcover quality: A durable edition built for repeated reference on your desk or in the lab.

Inside the Book

Each chapter builds on the last, starting with the fundamentals of garbage collection and moving into advanced G1 tuning. You will explore young and old generation collections, concurrent marking phases, and evacuation pauses. The book also covers the HotSpot VM's Serviceability Agent, showing how to inspect JVM internals without modifying source code. Practical exercises and code snippets help cement each concept.

Key Topics

• Garbage First (G1) garbage collector architecture and stages
• Comparing G1 with parallel, serial, and CMS collectors
• Fine-tuning G1 for latency-sensitive and throughput-oriented applications
• Using the HotSpot VM Serviceability Agent for performance diagnostics
• Heap analysis, GC log parsing, and performance regression testing
• Modern multicore and NUMA-aware optimization techniques

Reader Benefits

By the end of this book, you will be able to identify performance bottlenecks with confidence, tune garbage collection for specific workloads, and reduce application latency. You will also gain the ability to interpret experimental results and make data-driven decisions. This is not just theory—it is a practical toolkit for Java developers in Indian IT hubs like Bengaluru, Hyderabad, Pune, and Chennai.

Learning Outcomes

• Master the internal workings of G1 garbage collection from young to old generations
• Apply systematic methodologies to optimize heap size, thread stacks, and JVM flags
• Utilize the Serviceability Agent to inspect class loading, compilation, and runtime data
• Design performance tests that accurately reflect production workloads
• Avoid common pitfalls that degrade Java performance in enterprise applications

Who Should Read

This book is ideal for senior Java developers, software architects, performance engineers, and technical leads. It is also highly recommended for computer science students in India who are specializing in systems programming or preparing for roles at product-based companies. If you have ever struggled with OutOfMemoryErrors, long GC pauses, or mysterious slowdowns, this book is for you.

About the Author

Charlie Hunt is a globally recognized Java performance expert and former lead of the Java HotSpot VM performance team at Oracle. With decades of experience optimizing Java for some of the world's largest applications, he brings unparalleled depth to this subject. He has also contributed to the development of the G1 garbage collector and the Serviceability Agent.

About the Publisher

Addison-Wesley Professional is a premier imprint of Pearson Education, known for publishing authoritative technical books for software professionals. Their titles are trusted by developers worldwide for their accuracy, depth, and practical value. This hardcover edition is printed to high standards, ensuring longevity even with frequent use.

Conclusion

Java Performance Companion is more than a book—it is a mentor for anyone serious about Java performance. Whether you are tuning a microservice or a monolithic application, the insights here will save you hours of trial and error. Order your hardcover copy from Bookshops.in today and take the next step in mastering Java at scale.