Latest Updates

The last part of my journey into JVM startup. Why the AOT cache refuses Spring Boot fat jars, the extract command that fixes it, the rules of the cache, a Dockerfile that does it right, and real measurements on Petclinic.

Part 3 of my journey into JVM startup. How the JVM saves work between runs, from the 20-year-old CDS trick to the AOT cache of Project Leyden in JDK 24 and 25.

Part 2 of my journey into JVM startup. The interpreter, the JIT compiler, C1 and C2, tiered compilation, and why the first requests after a deploy are the slowest.

My journey to understand why Java apps start slow. Part 1 covers what I learned about bytecode, class loading, linking, initialization, and where all of it lives in memory.

A production-ready Keycloak login theme starter kit with npm package support, built using React, Keycloakify, and Shadcn UI.

A complete guide to building a production-grade file upload service featuring Magic Byte validation, ClamAV scanning, Database Encryption (Jasypt), and Cloud-Agnostic storage.