This deep technical walkthrough calculates the break-even point for self-hosting GLM-5.1 versus Claude API rates by modeling GPU utilization, hardware costs, and operations overhead.
A technical walkthrough of the platform features landing between Safari Technology Preview 255 and 256, separating cross-browser-safe capabilities from Safari-only ones and outlining a feature-detection plus CI-testing strategy that keeps stable WebKit users from regressing.
A technical walkthrough of detecting Zyxel GS1900 zero-day compromises through management-plane anomalies, configuration tampering, and network traffic indicators, after attackers hijacked nearly 1,000 switches in the wild.
A hands-on walkthrough of how to instrument an Electron desktop app to find its true memory hogs before committing to a Rust rewrite.
Discord's Rust rewrite took Windows memory from up to 4GB down to roughly 290MB. That number can be accurate and still tell you nothing about your Electron app. This is the profiling procedure to run before anyone on the team says the word "rewrite": what process.memoryUsage() actually measures, why a flat heap chart means you're looking at the wrong tool, per-process sampling with app.getAppMetrics(), per-renderer detail from the CDP Performance domain, a deterministic Playwright workload that makes two runs comparable, and the four numbers that decide the question — floor, warm-up peak, steady state and leak rate. Full write-up: https://hackyjs.com/posts/profiling-an-electron-apps-real-memory-hogs-before-a-rust-rewrite
Appending a timestamp or status line to an agent's system prompt changes the prompt prefix on every turn. Prompt caching matches only a contiguous token range from position zero, so the first changed token ends reuse and everything after it is reprocessed at full price. The post reports a case where a task that should have cost about $21 billed about $200, explains the arithmetic, and shows a cache-stable ordering: static system prompt first, volatile text at the tail. Full write-up: https://hackyjs.com/posts/why-appending-to-your-agents-system-prompt-breaks-prompt-caching
Chrome 157 reportedly ships on-device language detection on Android, and the interesting part isn't the detection call. It's that availability() is the API. This walkthrough covers why `'LanguageDetector' in window` is a false positive, what the four availability states mean, and how a typed capability probe lets callers tell a missing API from a model that still needs a download. Then a backend-free test harness: serve a static page over adb reverse and localhost counts as a secure context. Finally, the fallback ladder that still stays in place, plus the caveats worth flagging, since the release claim comes from secondary coverage and needs checking against the primary release notes. Full write-up: https://hackyjs.com/posts/testing-chrome-157s-languagedetector-api-on-android-without-a-backend