Java Performance
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Core Java
Stop Using Virtual Threads for Everything: Performance Lessons Learned
When JEP 444 landed in Java 21 in September 2023, the reaction across the Java community was unusually enthusiastic. Virtual threads promised…
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Core Java
Project Panama FFM API: Calling C Code Without JNI Hell
Java has always needed a way to call native code. Scientific computing, image processing, hardware drivers, cryptography libraries â the…
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Core Java
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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Core Java
The Split-Brain Problem in Plain English â 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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Core Java
ThreadLocal Is a Memory Leak Waiting to Happen With Virtual Threads â 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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Core Java
The Hidden Cost of Records: When Java’s Immutable Data Classes Quietly Hurt Your GC
Records are clean, expressive, and widely adopted â but in tight, allocation-heavy loops, they can pile invisible pressure on the…
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Enterprise Java
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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Core Java
Reading JVM Safepoint Logs Without Going Mad: A Practical Stop-the-World Diagnosis Guide
JFR and async-profiler guides are everywhere. Safepoint logs â the raw output that tells you exactly why your JVM froze â are…
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Enterprise Java
String Deduplication Is On By Default in G1 â 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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