Java
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Tracking Application Startup in Spring
Application startup performance is important for modern Spring applications. A slow startup can increase deployment time, delay container readiness, and…
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The Observer Effect in JVM Profiling
Attach a profiler to see what the JIT is really doing, and you’ve just changed what the JIT does. On…
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Understanding Ahead-of-Time (AOT) Caching in Java
Java applications have traditionally relied heavily on runtime class loading, linking, interpretation, profiling, and Just-in-Time (JIT) compilation. These mechanisms provide…
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G1 Isn’t the Only Default That Changed: A Java 25→26 Migration Reality Check
The real driver behind this migration isn’t curiosity, it’s a September 2026 licensing cliff. And what actually breaks isn’t quite…
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Array Covariance vs. Generic Invariance
Java’s type system disagrees with itself about one question: if String is an Object, is String[] an Object[]? Arrays say…
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Virtual Threads Are Quietly Killing WebFlux. Is That a Good Thing?
Teams are flipping one property, spring.threads.virtual.enabled=true, ripping out reactive pipelines, and getting the same or better tail latency back. That’s…
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Migrating to Spring Boot 3.x: A Practical Guide for Legacy Projects
No more fear: a 5-step checklist for upgrading old Spring applications, without the surprises. Introduction: Why the Jump From 2.x…
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Algebraic Data Types and Pattern Matching, Compared
Java, Rust, Scala, and Haskell all let you say “a Shape is exactly a Circle, a Square, or a Triangle,…
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Consistent Overflow: Two’s Complement and Modular Arithmetic
Java promises that Integer.MAX_VALUE + 1 always equals Integer.MIN_VALUE. That promise is exactly what let a bug hide inside the…
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