Articles — o612

2026-10-01•8 min read

git-pro — an Electron GUI that shares its state with a bash CLI

How git-pro, a small Electron app, manages multiple git identities by sharing one on-disk file format with a bash CLI — no database, no daemon.

ElectronJavaScriptGit

2026-09-27•18 min read

Building a lightweight method tracer with Byte Buddy — from runtime subclassing to a Java agent

Trace Java methods without touching their source, using Byte Buddy — runtime subclasses, method delegation, inlined advice, and a premain Java agent, all verified.

JVM

2026-08-13•8 min read

Processing millions of records in Java: chunking, streams, and memory-efficient pipelines

Process huge datasets in Java without OOM — combine keyset-paginated batches or true database streams with Stream pipelines, lambdas, and checkpoints.

JavaSpring BootPostgresPerformance

2026-08-11•37 min read

Analyzing Java heap dumps in production — a practical guide to memory leaks and retained objects

Capture and analyze Java heap dumps from Docker and Kubernetes workloads with a repeatable Eclipse MAT workflow that finds the object retaining the memory.

JVMPerformanceKubernetes

2026-05-02•24 min read

JVM internals, performance tuning, and diagnostics in Java 21

How the JVM actually runs Java 21 — bytecode, class loading, JIT, GC — plus an evidence-first method for tuning and diagnosing production incidents.

JVMPerformance

2026-03-28•22 min read

Hexagonal architecture with Spring Boot and Kotlin — a certificate service built from swappable modules

Ports and adapters in Kotlin — a Spring Boot certificate issuance engine where the core is framework-free and every adapter, and every certificate type, is a swappable module.