A join rule that matches ‘anything’ looks like an ordinary filter, until it quietly multiplies your row count. Measured, not estimated: what a wildcard join actually costs, why a CREATE INDEX line doesn’t always buy you a seek, and why UNPIVOT beats a ten-way OR chain.

Generic methods finally landed, json/v2 is already running underneath your code, and the allocator got faster while you weren’t looking. Six of this release’s changes take effect without you opting in; here’s which ones will cost you an afternoon.

Boundaries, communication styles, technology, and sagas all sound reasonable in isolation. Here’s what it looks like to actually apply all four decisions to one real workflow, in order.

“Agentic” gets thrown around loosely, but it means something specific: an assistant that decides its own next step instead of waiting for yours. That’s also exactly why you can’t trust it to tell you when it’s done a good job; here’s the verification habit that fixes that.

Splitting a monolith means splitting its database transactions too. The instinct is to reach for a distributed transaction. Here’s why that instinct is usually wrong, and what to do instead.

I spent my first month with Ghidra staring at assembly I didn’t understand, convinced I was too stupid for this. Here’s the honest version of how I got from ‘what is a register’ to solving CTF reversing challenges, and the mistakes that cost me weeks.

Some binaries detect that you’re debugging them and crash, change behavior, or hide the flag. This post covers the common anti-debugging techniques and how to bypass them.

Some CTF reversing challenges hide the flag behind a custom virtual machine: a program that interprets its own bytecode. This post shows you how to spot them, reverse the instruction set, and write a solver.

A crackme is a small binary that asks for a password and checks your input. This post walks through solving one, from downloading the binary to extracting the flag, with every tool click explained so you can follow along.

The communication style (sync/async, request-response/event-driven) narrows the field. Here’s how the actual technologies stack up once you’re choosing among them.