#performance
6 articles tagged performance, from Java, Spring AI. Latest: “Java 25's Compact Object Headers: I Measured the Real Savings So You Don't Have To”.
Java 25's Compact Object Headers: I Measured the Real Savings So You Don't Have To
JEP 519 shrinks every Java object header from 12 bytes to 8 in JDK 25. I ran real benchmarks on JDK 25.0.3 to measure the actual per-object savings.
10 Spring Boot Mistakes That Silently Kill Production Apps
A practical breakdown of the most common Spring Boot anti-patterns causing degraded performance, memory leaks, and outages — with before/after code.
Your Spring Boot App Starts in 3 Seconds. With GraalVM Native, It's 80ms.
A no-handwaving guide to compiling Spring Boot 3 apps to native executables — real benchmark numbers, common pitfalls, and when it's actually worth it.
We Replaced Spring WebFlux with Virtual Threads. Here's the Honest Result.
After 3 years of reactive streams in production, we migrated four services from WebFlux to virtual threads. Complexity halved, p99 latency dropped 34%.
Java 21 Virtual Threads: A Practical Guide for Spring Boot Developers
Virtual threads are Java 21's biggest performance upgrade in years, but most guides skip the real details — when to use them, Spring Boot, and pitfalls.
Virtual Threads in Spring Boot: What Changes and How to Use Them
Java 21's virtual threads let Spring Boot handle massive concurrency for I/O-bound work without going reactive — how to enable them, and the pitfalls to avoid.