Lazy Constants (JEP 531): JIT’s Best Friend You Haven’t Met

How ofLazy() unlocks constant-folding without static final, why it finally replaces double-checked locking, and what the numbers look like in practice. Every Java…

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The Split-Brain Problem in Plain English — And the Three Ways Your Distributed Cache Handles It Wrong

Redis Sentinel, Hazelcast, and Infinispan all have split-brain documentation. None of them tell you what your Java code silently observes…

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ThreadLocal Is a Memory Leak Waiting to Happen With Virtual Threads — Here’s the Proof

ThreadLocal was designed for a world of 200 pooled platform threads living for the life of an application. Virtual threads…

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The Hidden Cost of Records: When Java’s Immutable Data Classes Quietly Hurt Your GC

Records are clean, expressive, and widely adopted — but in tight, allocation-heavy loops, they can pile invisible pressure on the…

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Database Indexing Mistakes That Senior Java Developers Still Make in 2026: A Deep Dive With PostgreSQL and Hibernate

You’ve shipped dozens of services. You know what a B-tree is. Yet your PostgreSQL queries are still crawling at 3…

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Reading JVM Safepoint Logs Without Going Mad: A Practical Stop-the-World Diagnosis Guide

JFR and async-profiler guides are everywhere. Safepoint logs — the raw output that tells you exactly why your JVM froze — are…

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String Deduplication Is On By Default in G1 — And Most Developers Don’t Know What It Does

A granular look at what the JVM is quietly doing with your strings at the native level, when that work…

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The Lies Your Microbenchmarks Tell You: A JMH Field Guide for Backend Engineers

JMH is powerful, but deceptively easy to misuse. Here are the five pitfalls that silently corrupt your results — and…

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The Object Allocation Tax: Why Your Java Service Is 40% GC and How the JIT’s Escape Analysis Both Helps and Misleads You

A ground-level look at how HotSpot C2 decides between scalar replacement and heap allocation, the everyday patterns that silently defeat…

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