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This article mainly explains "what are the Java performance optimization skills". The content of the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what Java performance optimization skills are there?"

1. Do not optimize until you confirm that it is necessary

You should follow common best practices and try to implement use cases efficiently. However, this does not mean that you should replace any standard libraries or build complex optimizations before you prove it necessary. In most cases, premature optimization not only takes a lot of time, but also makes the code difficult to read and maintain.

two。 Use the analyzer to find the real bottleneck of optimization

After you have determined that some parts of the application need to be improved, you can try to look at your code and start with the parts that look suspicious or that you think may cause problems. Or use the parser and get detailed information about the behavior and performance of each part of the code. These two ways to solve the problem.

3. Create a performance test suite

The advantage of this is that it can help you avoid many of the unexpected problems that often occur after performance improvements are deployed to production. You should always define a performance test suite that tests the entire application and run it before and after performance improvements. And additional test runs will help you identify the functional and performance side effects of the changes and ensure that they do not cause updates that do more harm than good.

4. Use primitives whenever possible

Another easy and quick way to avoid any overhead and improve application performance is to use base types instead of their wrapper classes. Therefore, it is best to use int instead of Integer and double instead of Double. This allows JVM to store values on the stack instead of the heap to reduce memory consumption and to do more efficient processing.

5. Cache expensive resources, including database connections

Caching is a popular solution to avoid repeated execution of expensive or commonly used code snippets. The general idea is simple: it is cheaper to reuse these resources than to create new ones over and over again. A typical example is a database connection in a cache pool. New connections take time to create, and you can avoid this if you reuse existing connections.

Thank you for your reading, the above is the content of "what are the Java performance optimization skills". After the study of this article, I believe you have a deeper understanding of what Java performance optimization skills are, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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