This authoritative guide to Alibaba's internal optimization is based on the system-related problems encountered by the author in actual work and the solutions. The code improves system performance and solves system failures caused by the code. The guide also describes how to use high-performance open source tools in the system, as well as code optimization and design techniques to improve performance.
In addition, how to write maintainable code is also within the scope of writing. The guide also introduces some underlying technologies, such as Java bytecode, ASM and JSR269. These technologies can also be used in projects to help improve performance and facilitate code maintenance. From the perspective of high performance, easy maintenance, code enhancement, and writing Java code in a micro-service system, how to implement a high-performance Java system is described. Most of the examples in the guide are extracted from Alibaba's internal applications and Alibaba's concurrent system, which are of great reference significance. The guide covers a wide range of knowledge and can also be used as a reference book for Java written examinations and interviews.
The whole guide is divided into five parts. The following will analyze each part step by step. Due to the length of the article, only part of the content and catalog can be shown for you. The full and detailed version is freely obtained at the end of the article!
first part
The first part is from Chapter 1 to Chapter 5. Chapter 1 introduces how to optimize the Java system and how to use JMH to verify performance optimization through a code optimization example of no more than 10 lines; Chapter 2 and Chapter 3 introduce the core of JDK Class String, Number and concurrent packages; Chapter 4 explains various methods of Java performance optimization through more than 20 optimization techniques; Chapter 5 introduces commonly used high-performance tools, such as Caffeine, Jackson, HikariCP, and its high performance The reason has done a certain source code analysis.
Chapter 1 Java Code Optimization
Chapter 2 String and Number Operations
Chapter 3 Concurrent Programming and Asynchronous Programming
Chapter 4 Code Performance Optimization
Chapter 5 High Performance Tools
the second part
The second part is Chapter 6 and Chapter 7, which is different from the code specification. This part emphasizes writing easy-to-read code and will explain it from three aspects: code comments, code decomposition, and object-oriented. Easy-to-read code is a prerequisite for system performance optimization.
Chapter 6 Java Annotation Specification
Chapter 7 Readable Code
the third part
The third part is Chapter 8, which introduces JIT optimization. JIT optimization has a profound impact on the operation of the Java system. This chapter systematically introduces the knowledge of JIT compiler, code caching, inlining and so on.
Chapter 8 JIT Optimization
fourth part
The fourth part is Chapter 9, which contains more than 30 "bad smell" code snippets. Readers can try to optimize the code.
Chapter 9 Code Review
the fifth part
The fifth part is Chapter 10 and Chapter 11. Chapter 10 introduces Java bytecode and ASM, which are used to enhance the Java system at runtime; Chapter 11 introduces the JSR269 specification, which is used to enhance the Java system at compile time. By using these technologies, the maintainability and performance of the system can be effectively improved.
Chapter 10 ASM runtime enhancements
Chapter 11 JSR269 Compile Time Enhancements
to sum up
With the continuous iteration of the demand function, the system bottleneck becomes more and more obvious. This guide provides a detailed explanation of the system performance optimization encountered in the work and provides a set of practical guidelines. How to break the ring flavor of the system? How to improve the performance of the system? How to design a high-performance technical architecture? Reading this Ali internal optimization guide is helpful for readers.
Alibaba’s latest internal Java development specifications and system performance optimization guidelines are 100% free to obtain:
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