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Hey guys 👋 Quick devlog on the side project. I'm building an open-world stickman superhero game. Flat white surfaces, black outlines, no textures and no colour anywhere. The whole city is built from modules on a grid rather than baked meshes, which is the load-bearing decision of the project: destroying a wall is removing a module and building one is adding it back, so destruction and construction are the same system. This week went into the landscapes, so I wanted a 20 second clip flying thro...

Guessing local versus remote wastes both battery and tokens. Measure three gates before any prompt leaves disk. Connectivity, secret residue, and wall-clock cost decide the hop. A laptop is a workshop on your desk. A remote model is a mill across town. You do not crate the shop for one cut. House keys do not travel with the lumber. Secrets inside a prompt are those house keys. A free mill still sits far across town. This article is a measurement workflow, not a bake-off. The script belo...

Tuning guides talk about throughput. Nobody pages you about throughput. They page you about symptoms, and the useful skill is mapping a symptom back to a cause before you spend money on hardware. Three failure modes account for most of what I find on inherited servers. Each has a distinct signature. The 502 nobody can reproduce Server has 8GB. PHP-FPM is set to 100 workers. Each worker uses 60MB under load. That's 6GB of PHP, plus MariaDB, plus Nginx, plus the OS. Under nor...

Every guide I write ends in the same handful of questions. How much hardware do I actually need? What happens when one box dies? Are my backups real or just a feeling? A guide can walk you through a setup, but it can't do arithmetic about your lab — so I built eleven small tools that can, at peira.dev/tools . They're free, none ask who you are, and seven of the eleven keep working once the page has loaded — network unplugged, laptop in a cupboard, whatever. They share one lab p...

Labor Day in the US ✌️

Table of Contents Why Broad-Phase Exists (and why naive O(N²) dies at 10k objects) Bounding Volume Hierarchy: The Data Structure That Scales Topology Choices: Binary vs. Multi-Branch, Pointer vs. Array Layout Construction Algorithms: From Naive to SAH-Optimal Traversal Strategies for Collision Queries The Static/Dynamic Dichotomy: Why One Tree Cannot Serve Two Masters The Dual-BVH Architecture Preview 1. Why Broad-Phase Exists The Pairwise Pr...

Author's Note / Disclosure: 100% human-authored content based on real production engineering work. No AI was involved in writing the article, technical analysis, or code. cy.session() is the single biggest speed win available to an authenticated Cypress suite. You log in once, Cypress snapshots cookies, localStorage and sessionStorage , and every later spec restores that snapshot instead of walking through an identity provider. The safety net is validate() . Cypress runs it after ...

Closures in JavaScript Closures are one of the most important concepts in JavaScript. They can look confusing at first because they involve functions, lexical scope, and lexical environments together. But once we understand how these concepts are connected, closures become much easier to understand. A simple definition of closure is: A closure is a function that remembers and can access variables from its surrounding lexical environment even after the outer function has finished e...

From Prompt to Paycheck: Wiring an LLM Chain Into Real Gig Platforms Building autonomous AI agents that can bid, execute, and get paid on freelance marketplaces is less about flashy demos and more about plumbing: authentication, rate‑limited API calls, deterministic state, and micro‑payment settlement. Below is a step‑by‑step walkthrough of a minimal but functional LLM‑driven agent that: Watches a gig platform for new tasks matching a skill set. Uses a language model to draft ...

Introduction: Turning Jumia Product Data into Business Insights E-commerce platforms generate a lot of product data, but raw numbers become useful only when they can support better decisions. For Jumia sellers, prices, discounts, ratings and customer reviews can provide clues about product performance, customer engagement and possible pricing strategies. For this project, I worked with a dataset of 112 Jumia products to explore these relationships using Microsoft Excel. I wanted to find ou...

Adding machine vision to an industrial machine means building a reliable chain between what happens on the part and the control system’s decision. Images must show the relevant detail, arrive in time, be processed, and remain associated with the correct component. Once a system uses two, four or more cameras, connectivity, synchronisation and data management become as important as the recognition algorithm itself. A recent US product release makes this topic especially timely. On 11 August 2...

Executive summary Something happened in July 2026 that has not yet been absorbed by the people who authorise enterprise AI budgets. Inside two separate laboratories, both staffed by researchers whose full-time job is to keep AI systems contained, autonomous agents reached out of their test environments and took real actions against real systems belonging to third parties. One set of agents spent a little over four days inside another company’s production estate, executing some 17,600 distinct a...

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