Infrastructure articles from Pickuma. Tested, not generated.https://pickuma.com/en-ushttps://pickuma.com/posts/training-llm-swift-matrix-multiplication-gflops-tflops/https://pickuma.com/posts/training-llm-swift-matrix-multiplication-gflops-tflops/A technical walkthrough of optimizing matrix multiplication in Swift on Apple Silicon — loop reordering, cache blocking, SIMD, multithreading, and GPU offload — and why matmul throughput sets your LLM training speed.Wed, 20 May 2026 08:41:29 GMTinfrastructurecursorOwenhttps://pickuma.com/posts/debugging-econnreset-errors-nodejs/https://pickuma.com/posts/debugging-econnreset-errors-nodejs/ECONNRESET in Node.js usually traces to an idle connection closed by a load balancer or proxy while your keep-alive pool still holds it. Here is how to find the real cause and fix it.Wed, 20 May 2026 07:05:28 GMTinfrastructurecursorOwenhttps://pickuma.com/posts/self-hosting-guide-review-local-llms-home-server/https://pickuma.com/posts/self-hosting-guide-review-local-llms-home-server/A review of mikeroyal's Self-Hosting Guide, the GitHub resource for running local LLMs, WireGuard VPNs, Home Assistant, and private cloud on your own hardware — plus where self-hosting saves money and where it doesn't.Wed, 20 May 2026 06:55:29 GMTinfrastructurebeehiivOwenhttps://pickuma.com/posts/pypi-package-growth-supply-chain/https://pickuma.com/posts/pypi-package-growth-supply-chain/PyPI's catalog is growing faster than ever. Here's how the surge affects supply-chain risk, dependency bloat, and what to use when you audit your tree.Mon, 18 May 2026 14:11:59 GMTinfrastructurecursorOwenhttps://pickuma.com/posts/immich-review-self-hosted-google-photos-alternative/https://pickuma.com/posts/immich-review-self-hosted-google-photos-alternative/A measured look at Immich, the open-source self-hosted photo platform with mobile apps and on-device ML, covering deployment, AI features, and the tradeoffs of running it yourself.Mon, 18 May 2026 14:05:26 GMTinfrastructureOwenhttps://pickuma.com/posts/supabase-review-open-source-postgres-ai-backend/https://pickuma.com/posts/supabase-review-open-source-postgres-ai-backend/A measured review of Supabase — the open-source Firebase alternative built on dedicated Postgres with auth, storage, realtime, and pgvector. What holds up for AI backends, what doesn't, and where pricing and the realtime engine bite.Mon, 18 May 2026 02:00:47 GMTinfrastructurecursorOwenhttps://pickuma.com/posts/coolify-review-self-hosted-vercel-alternative/https://pickuma.com/posts/coolify-review-self-hosted-vercel-alternative/Coolify is an open-source PaaS you self-host for around $6/month. We tested its 280+ one-click services and where it beats Vercel/Heroku — and where it doesn't.Mon, 18 May 2026 01:52:52 GMTinfrastructureOwenhttps://pickuma.com/posts/rk3562deb-arm-tablet-debian-linux-dev-workstation/https://pickuma.com/posts/rk3562deb-arm-tablet-debian-linux-dev-workstation/We read through the rk3562deb project that converts cheap RK3562 Android tablets into Debian Linux machines. Here's what works, what doesn't, and which dev workflows actually fit.Mon, 18 May 2026 01:49:20 GMTinfrastructurecursorOwenhttps://pickuma.com/posts/americans-oppose-ai-data-centers-developer-implications/https://pickuma.com/posts/americans-oppose-ai-data-centers-developer-implications/A new poll shows roughly 70% of Americans don't want AI data centers built nearby. Here's how the resulting permitting drag will hit inference pricing, region availability, and your architecture decisions.Mon, 18 May 2026 01:19:24 GMTinfrastructurecursorOwenhttps://pickuma.com/posts/mozilla-vpns-uk-regulators-developer-privacy/https://pickuma.com/posts/mozilla-vpns-uk-regulators-developer-privacy/Mozilla told UK regulators VPNs are essential privacy infrastructure, not threats to be neutered. Here's why developers rely on VPNs more than they realize, and what changes if Ofcom listens to the other side.Mon, 18 May 2026 01:13:22 GMTinfrastructureOwenhttps://pickuma.com/posts/npm-supply-chain-attacks-defense/https://pickuma.com/posts/npm-supply-chain-attacks-defense/Why npm keeps getting hit with malicious packages, what makes Node's registry uniquely exposed, and a practical defense stack (Socket, Snyk, lockfile audits, --ignore-scripts) for teams shipping JavaScript at scale.Mon, 18 May 2026 01:08:12 GMTinfrastructurecursorOwenhttps://pickuma.com/posts/best-domain-registrars-developers-2026/https://pickuma.com/posts/best-domain-registrars-developers-2026/A developer-focused comparison of domain registrars: API access, DNS management, WHOIS privacy, and honest renewal pricing. Stop overpaying for domains you bought years ago and forgot about.Thu, 14 May 2026 00:00:00 GMTinfrastructureporkbuncloudflarenamecheapOwenhttps://pickuma.com/posts/cloudflare-workers-bun-2026/https://pickuma.com/posts/cloudflare-workers-bun-2026/A hands-on look at running Bun-based JavaScript apps on Cloudflare Workers — cold starts, free tier limits, the node:* compat story, and when Workers beats a VPS for developer side projects.Thu, 14 May 2026 00:00:00 GMTinfrastructurecloudflareOwenhttps://pickuma.com/posts/supabase-vs-firebase-2026/https://pickuma.com/posts/supabase-vs-firebase-2026/A practical head-to-head between Supabase and Firebase for indie developers building in 2026. Covers Postgres vs Firestore, authentication, realtime subscriptions, pricing cliffs, and when open-source ownership beats vendor convenience.Thu, 14 May 2026 00:00:00 GMTinfrastructuresupabasefirebaseOwenhttps://pickuma.com/posts/vs-fly-vs-railway/https://pickuma.com/posts/vs-fly-vs-railway/We deployed the same Next.js app + Postgres database to Fly.io and Railway and measured time-to-first-deploy, cold starts, and the developer experience gap. Railway won on speed; Fly.io won on global reach. Here's the breakdown.Thu, 14 May 2026 00:00:00 GMTinfrastructureflyrailwayOwenhttps://pickuma.com/posts/vs-vercel-vs-netlify/https://pickuma.com/posts/vs-vercel-vs-netlify/We deployed the same Next.js e-commerce site to both platforms and measured cold starts, build times, and edge latency. Vercel was faster — but Netlify's platform features caught up in one critical area.Thu, 14 May 2026 00:00:00 GMTinfrastructurevercelnetlifyOwenhttps://pickuma.com/posts/paperless-ngx-self-hosted-document-management-for-developers/https://pickuma.com/posts/paperless-ngx-self-hosted-document-management-for-developers/A hands-on review of paperless-ngx, the open-source self-hosted DMS. We cover the Docker stack, OCR pipeline, REST API, AI workflow integration, and where Whoosh search hits its limits.Tue, 12 May 2026 08:16:54 GMTinfrastructurenotionOwenhttps://pickuma.com/posts/gitleaks-open-source-secret-scanning-2026/https://pickuma.com/posts/gitleaks-open-source-secret-scanning-2026/A hands-on review of Gitleaks for catching hardcoded secrets in Git history. Covers the CLI, pre-commit hooks, CI integration, and how it stacks up against GitGuardian for teams that don't want to pay per developer.Tue, 12 May 2026 08:15:24 GMTinfrastructureOwenhttps://pickuma.com/posts/eleven-browser-games-design-system/https://pickuma.com/posts/eleven-browser-games-design-system/play.pickuma.com now has eleven games. After the first two, the bottleneck was no longer game logic — it was the chrome around each game. Here's the design system that made the next nine fast.Tue, 12 May 2026 08:00:00 GMTinfrastructureOwenhttps://pickuma.com/posts/two-web-games-weekend-build-launch/https://pickuma.com/posts/two-web-games-weekend-build-launch/Stop at 7.77 and Eagle Run are live at play.pickuma.com. A 250-line vanilla canvas game and a one-button time-sense test, both shipped in a day. The stack, the tradeoffs, the things that worked.Tue, 12 May 2026 07:15:00 GMTinfrastructureOwenhttps://pickuma.com/posts/obsidian-plugin-phantom-pulse-rat-supply-chain/https://pickuma.com/posts/obsidian-plugin-phantom-pulse-rat-supply-chain/A malicious Obsidian community plugin delivered the Phantom Pulse RAT to developer vaults. Here is the attack chain and how to audit plugins in Obsidian, VS Code, and Cursor.Tue, 12 May 2026 06:13:07 GMTinfrastructurecursorOwenhttps://pickuma.com/posts/best-free-tiers-developers-2026/https://pickuma.com/posts/best-free-tiers-developers-2026/A 2026 audit of free-tier developer services: which hosting, database, CI/CD, and observability platforms still let you ship a side project for $0, where the hidden cliffs are, and when paying actually costs less than working around limits.Mon, 11 May 2026 23:29:23 GMTinfrastructurecursorOwen