Turning Linear Search into a Surprisingly Performant Data Processing Engine
Filter 25 million property records by 87 criteria in under 100 ms to help decide where to buy a home.
https://schmelczer.dev/articles/
Articles
Technical articles and notes about projects, systems, AI deployment, graphics, simulations, and tools.
2026
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Conflict-free 3-way Text Merging
Both sides' edits survive, cursors move with them, and no conflict markers appear. Available for Rust, JavaScript, and Python.
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Compounding Self-Hosting
Combining Immich, Home Assistant, an e-ink screen, and an overpowered Raspberry Pi for truly personal tech.
2024
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A Fleeting Garden on Your GPU
A WebGPU slime mould simulation. Control millions of agents with your paintbrush and watch them bring your drawing to life.
2023
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A Simple, Sophisticated Backup Strategy
One short shell script backs up my entire home server live by relying on crash recovery instead of per-database tooling.
2020
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A Real-Time 2D Ray Tracer That Runs on Phones
A TypeScript library that ray-traces 2D scenes built from signed distance fields. Tile-based rendering and generated shaders keep it real-time on phones.
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One Game Library, Imported by Both the Client and the Server
A mobile multiplayer browser game where client and server linked the same TypeScript module. One source of truth, one fewer class of bug.
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A 50 FPS Game Engine on an 8-Bit Microcontroller
A handheld game built from the PCB up: ATtiny85V, OLED, IR receiver. 8 MHz, 512 bytes of RAM, and a charming atmosphere.
2018
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A City Where Bad PLC Code Made Cars Crash
A low-poly Unity city built for a CrySyS PLC-hacking challenge, with explosive results.
2017
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A 3D Voxel Game in C
My Basics of Programming project: a 3D platformer in pure C with SDL 1.2. Destructible voxel terrain, flying enemies, and a renderer derived on Post-it notes.
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My first browser game
A small game I used as the handout for SchDesign's JS/Canvas workshop at BME. It's trivial, but I still find it enjoyable.
2016
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Photo Site Generator
My photo portfolio site: once PHP on a Raspberry Pi, now a Vite script turning a folder of JPEGs into static HTML. Publishing a photo costs one
git push.
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A Physics Practice App for the Hungarian Érettségi
How I learnt what good software actually means.
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My First Real Project: LEDs Driven by an FFT
A Raspberry Pi music player that drove RGB LED strips through MOSFETs.
