Project Leyden Boosts Java Performance with María Arias de Reyna Domínez

How is Leyden improving Java Performance? Part 3 of 3 of our series on Project Leyden is now available on Foojay. María Arias de Reyna Domínguez wraps up this comprehensive look at how Project Leyden aims to enhance Java's startup time, time to peak performance, and footprint. This concluding article covers the practical aspects and real-world implications of the changes coming to the Java ecosystem. If you've been following parts 1 and 2, this is the piece that ties everything together. New to the series? You can still jump in and get valuable insights. Read the full article: https://lnkd.in/eihVDgKh #Java #ProjectLeyden #Performance #OpenJDK

🚀 Why Java Still Dominates: Java 26 Key Updates Sometimes, tech discussions spark one big question: "Why does Java, a language that’s been around for decades, still rule the programming world?" The answer is simple — Java evolves like nature itself: it adapts, absorbs change, and keeps moving forward. 🌱 As of 17th March 2026, Java 26 is here, bringing key updates that make it faster, cleaner, and more scalable than ever. I’ve distilled the Java 26 updates into a concise blog for busy developers and architects: 1️⃣ What changed 🔄 2️⃣ Previous behavior ⏳ 3️⃣ Current behavior ⚡ 4️⃣ Advantages of these updates 💡 5️⃣ How the changes help achieve these advantages 🚀 Whether you’re designing enterprise systems, optimizing backend performance, or exploring scalable software architectures, these updates matter — and knowing them gives you an edge in building future-proof solutions. Read the full blog here: https://lnkd.in/gTdJGNiV 💬 I’d love to hear your thoughts: Which Java 26 feature excites you the most? How will it impact your projects? #Java #Java26 #JavaDevelopers #BackendDevelopment #SoftwareEngineering #TechTrends #Programming #ScalableSoftware #JavaUpdates #DeveloperCommunity #TechBlog #SoftwareDesign #CleanCode #TechLeadership #InnovationInTech

I upgraded the dmx-fun library to Java 25. I thought it was important to write a blog post explaining why it's important for you to update as well, if possible. https://lnkd.in/g7i565qp

María Arias de Reyna Domínguez continues her technical series on Project Leyden, focusing on how it addresses Java's performance challenges. This second part examines the mechanisms behind Leyden's optimization strategies and their practical impact on application startup and runtime behavior. Read the full article: https://lnkd.in/dA87is-m Author: María Arias de Reyna Domínguez #Java #ProjectLeyden #Performance #JVM

Java continues to evolve, and each new release reinforces its relevance in modern software development. Java 26 brings incremental but meaningful improvements focused on developer productivity, performance, and code clarity. Some highlights include: • Pattern Matching (more complete and expressive) Pattern matching keeps expanding beyond instanceof and switch, allowing safer and more concise type checks and deconstruction. This reduces the need for explicit casting and nested conditionals, making code easier to read and less error-prone, especially in complex domain logic. • Structured Concurrency (safer multithreading) Java continues improving its approach to concurrency with structured concurrency APIs. Instead of managing threads manually, developers can treat multiple tasks as a single unit of work, improving error handling, cancellation, and overall readability of concurrent code. • Scoped Values (modern alternative to ThreadLocal) Scoped values provide a safer and more predictable way to share data across threads, especially in concurrent environments. Unlike ThreadLocal, they avoid common pitfalls like memory leaks and unclear data flow. • Foreign Function & Memory API (closer to native performance) This API continues to evolve, enabling Java applications to interact more efficiently with native code and memory outside the JVM. It reduces the need for JNI and allows safer, more performant integrations with system-level libraries. • Ongoing JVM and Garbage Collector optimizations Under the hood, the JVM keeps getting faster and more efficient. Improvements in garbage collection and runtime optimizations translate into better performance, lower latency, and more predictable behavior in production systems. Java’s strategy is clear: no radical disruptions, just consistent, high-impact improvements that compound over time. #Java #SoftwareEngineering #Backend #Programming #TechEvolution

🚀 CompletableFuture — Writing truly asynchronous Java code Most of us start with multithreading using Threads or ExecutorService. But things quickly get complicated when: You need to run multiple tasks at the same time You want to combine results from different services You want to avoid blocking the main thread That’s where CompletableFuture changes the game 🔥 Instead of manually managing threads, it allows you to build asynchronous workflows in a clean and structured way. Here’s what makes it powerful: 🔹 Run tasks asynchronously without blocking 🔹 Chain multiple operations seamlessly 🔹 Combine results from different async calls 🔹 Handle exceptions gracefully without breaking flow 🔹 Improve performance in high-load systems It’s widely used in real-world scenarios like: • Microservices communication • API aggregation (calling multiple services and combining responses) • High-performance backend systems The biggest shift? You stop thinking in terms of threads… and start thinking in terms of data flow and task pipelines. 💡 My takeaway: Mastering CompletableFuture helps you write scalable and efficient backend code without the complexity of traditional multithreading. ❓ Question for you: Are you still using traditional multithreading, or have you explored asynchronous programming in Java? #Java #AdvancedJava #CompletableFuture #Multithreading #BackendDevelopment #SoftwareEngineering

How Garbage Collection actually works in Java ? Most developers know this much: “Java automatically deletes unused objects.” That’s true - but not how it actually works. Here’s what really happens: Java doesn’t delete objects randomly. It uses Garbage Collection (GC) to manage memory intelligently. Step 1: Object creation Objects are created in the Heap memory. Step 2: Reachability check Java checks if an object is still being used. If an object has no references pointing to it, it becomes eligible for garbage collection. Step 3: Mark and Sweep The JVM: • Marks all reachable (active) objects • Identifies unused ones • Removes those unused objects from memory Step 4: Memory cleanup Freed memory is reused for new objects. Here’s the key insight: Garbage Collection is not immediate. Just because an object has no reference doesn’t mean it’s deleted instantly. The JVM decides when to run GC based on memory needs. Java doesn’t magically manage memory. It uses smart algorithms to track object usage and clean up when needed. That’s what makes Java powerful - and sometimes unpredictable. #Java #JVM #GarbageCollection #CSFundamentals #BackendDevelopment

🚀 Day 43 – Core Java | Interfaces Deep Dive (JDK 8 & 9 Evolution) Today’s session focused on how Java Interfaces evolved over time to solve real-world problems like code breaking, scalability, and maintainability. 🔹 Before Java 8 Interfaces could only have: ✔ Abstract methods ✔ public static final variables 👉 Problem: If a new method was added to an interface, all implementing classes would break. 🔹 Java 8 Solution ✔ Default Methods → Allow method implementation inside interface → Help achieve backward compatibility → Old classes continue to work without changes ✔ Static Methods → Can be accessed without object creation → Called using: InterfaceName.method() → Not inherited by implementing classes 🔹 Java 9 Enhancement ✔ Private Methods → Used to remove duplicate code inside interface ✔ Private Static Methods → Used when common logic is needed inside static methods 👉 This helps in writing clean and reusable code 🔹 Key Behavior to Remember ✔ Default methods → Inherited → Can be overridden ✔ Static methods → Not inherited → Cannot be overridden 🔹 Real-Life Understanding Think of a 5G mobile network: Even if 5G is not available, your phone still works on 4G/3G 👉 This is exactly how backward compatibility works in Java using default methods. 🔹 Functional Interface (Important for Interviews) ✔ Interface with only one abstract method ✔ Can have multiple default/static methods ✔ Used in Lambda Expressions & modern Java development 💡 Biggest Takeaway Interfaces are not just for abstraction anymore — they are designed to build flexible, scalable, and future-proof systems. #Day43 #CoreJava #JavaInterfaces #JDK8 #JDK9 #JavaLearning #DeveloperMindset #InterviewPreparation

Building LLM apps in Java is no longer experimental. It’s about doing it right. I put together a practical guide using LangChain4j, focusing on real concerns beyond demos: 👉 https://lnkd.in/eU_3mpS6 RAG quality, observability, and failure handling matter far more than prompt tricks.