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<h1>1. Overview</h1>
<p>Optimizing your code performance is critical for the success of your profile. Did you know that Akamai’s research found that 57% of online consumers abandon a website if a page takes longer than 3 seconds to load? In this post, you will learn how to optimize your Java code and improve your code performance.</p>
<h1>2. Virtual Threads</h1>
<p>Say no more to OutOfMemoryError: unable to create new native thread Error.</p>
<p>Java virtual threads, introduced in Java 19, can significantly improve the performance of your project.</p>
<p>In the previous releases of Java, there was only 1 type of thread (Classic threads) when a classic thread is created an OS thread is allocated and the number of threads is limited to the OS threads.</p>
<p>Starting from JDK 19, you can create virtual threads which are much lighter than OS threads and you can create and run thousands of virtual threads in an application.</p>
<p>To enable virtual threads in a Spring Boot application add the following code to your application.properties.</p>
<p>spring.threads.virtual.enabled=true</p>
<h1>3. Lazy loading</h1>
<p>A lot of performance problems arise from fetching data that you don’t need.</p>
<p>It’s best practice to only load objects when needed.</p>
<p>For instance, you can use FetchLazy in Hibernate but always keep in mind that the appropriate fetch strategy depends on the specific use case you’re dealing with.</p>
<p>fetch = FetchType.LAZY</p>
<h1>4. Cache</h1>
<p>Minimize disk access by caching frequently accessed data. By using proper caching techniques you can reduce latency, avoid network congestion and improve content availability.</p>
<p>The Spring framework provides support for various cache providers including but not limited to Redis, Caffeie, Cache2k etc…</p>
<h1>5. Avoid GenerationType.TABLE</h1>
<p>When choosing a key generation strategy in JPA, it’s important to select the one that best fits the database you’re using.</p>
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Java, Angular, Spring Boot, Docker, Linux

Kramti

Learn key techniques to optimize Java performance, including using virtual threads from Java 19, implementing lazy loading in Hibernate, and utilizing caching strategies in the Spring framework. Additionally, avoid using GenerationType.TABLE for key generation in JPA to enhance efficiency.