Why should Java developers master the knowledge points of performance tuning?
Remember, knowledge about performance tuning is one of the important aspects for advanced Java developers that can set you apart. Java is currently one of the most widely used programming languages in the field of software development . Java applications are widely used in many vertical fields (banking, telecommunications, healthcare, etc.). The purpose of Refcard is to help developers improve the performance of applications in a business environment by focusing on JVM internals, performance tuning principles and best practices, and using existing monitoring and troubleshooting tools.
Getting Java applications to run is one thing, but making them run fast is another . In an object-oriented environment, performance issues are like ferocious beasts. But the complexity of the JVM increases the complexity of performance tuning by a level. Here Refcard covers JVM internals, class loading (updated in Java 8 to map the latest metaspace), garbage collection, fault diagnosis, detection, concurrency, etc. Therefore, what are we waiting for, let us begin to explore the tuning road of Java performance tuning.
As the saying goes: "Teaching people how to fish is worse than teaching people how to fish." Share this performance tuning practice manual and supporting videos here to those in need. You will master the system performance optimization methodology, have an in-depth understanding of the design of common Java middleware from the perspective of performance optimization, and provide a reasonable design The performance optimization plan will greatly help everyone's learning advancement! Due to space reasons, this article only shows the catalog and content screenshots, there are small partners who need to learn performance tuning to scan the code!
Performance Tuning Handbook: Concepts
Why is the program always so slow? What is it doing now? Where is the time spent? Maybe you often complain about these problems. If so, it means that your program has a performance problem.
Concept film content display:
Performance tuning combat: design patterns
The design pattern is the summary and refinement of previous work. The design patterns that are usually widely circulated are mature solutions to a specific problem. If the design pattern can be used reasonably, it will not only make the system easier to understand by others, but also make the system have a more reasonable structure. This section summarizes some classic design patterns and explains in detail: the relationship between them and software performance.
Design mode content display:
Performance tuning combat: Java programming tuning articles
Optimize Java applications at the code level. Compared with design optimization, program-level optimization is more tricky. Efficient and refined code, correct function usage and good software development habits also have a decisive impact on the overall performance of the application . It can be said that the optimization of the code level is a compulsory course for every programmer, and it runs through the entire software coding process from beginning to end.
Java programming tuning content display:
Performance tuning combat: multi-threaded articles
Java-based parallel program development and optimization methods. For multi-core CPUs, traditional serial programs can no longer give full play to the performance of the CPU. At this time, it is necessary to tap the potential of the CPU by using multi-threaded parallelism. The main knowledge points involved in this chapter are:
Multi-threaded content display:
Performance tuning combat: JVM performance monitoring and tuning articles
This chapter mainly introduces the performance tuning methods at the JVM virtual machine level. Since Java bytecode runs on the JVM virtual machine, the same bytecode runs with different JVM virtual machine parameters, and its performance may vary. In order to optimize the performance of the system, it is necessary to select the appropriate JVM parameters to run Java applications.
JVM performance monitoring and tuning content display:
Performance tuning combat: database performance tuning articles
We know that the interaction between application services and the database is mainly achieved through SQL statements. In the early stages of development, we paid more attention to the use of SQL to implement business functions. However, after the system went online, with the rapid growth of data in the production environment, many SQL statements written before began to expose performance problems.
At this stage, we should try to avoid the implementation of some slow SQL statements. But having said that, there are thousands of reasons why SQL statements are slow. Except for some regular slow SQL statements, which can be directly avoided, it is not a way to avoid them blindly. We have to learn how to analyze and locate the root cause, and summarize some Commonly used SQL tuning methods to prepare for emergencies.
Database performance tuning chapter content display:
Share this [Performance Tuning Practical Manual] document here with a total of 465 pages. Friends who need the full version can forward this article to the editor and scan the code to get it!
to sum up
In summary, performance optimization itself is critical to program performance, and performance optimization is also a comprehensive knowledge point. Although it is aimed at performance optimization of Java programs, comprehensive factors still need to be considered. With the vigorous and rapid development of IT technology, performance tuning is no longer just a code-level tuning, it is a need for in-depth understanding of comprehensive knowledge, and we can truly find a reasonable solution only by combining multiple technologies.
Well, today’s sharing is over. I hope to help you learn. While improving the depth and breadth of your own technology, don’t forget to flexibly apply the knowledge you have to your work and get promoted. Raises. work together!