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Nginx handles hundreds of thousands of connections with 4 cores. Here's why: event-driven epoll loops, 11-phase HTTP pipelines, pool allocators, and a master-worker model built for zero-downtime reloads.

"Our database is highly available" means four different things, and they protect against four different failures. A ladder for forcing that conversation to be specific — plus why the money most teams spend on availability goes to the failure modes they face least.

Astro's JavaScript floor is zero; Next.js's is a framework baseline. That one architectural difference — hydration opt-in vs opt-out — decides most of this comparison, and it matters much less than it sounds once your users are logged in.

You've run git commit thousands of times. But have you ever wondered what actually happens when you do? Git isn't a file-syncing tool with version numbers bolted on.

Docker containers aren't tiny VMs. They're Linux processes wrapped in namespaces, cgroups, and OverlayFS — here's how the kernel primitives actually fit together.

One binary and one config against six packages and a decade of plugins. The gap is real but narrower than the write-ups claim — Biome has had React Hooks rules since v1.0.0, and its v2 config drops the field most tutorials still tell you to set.

Express has the ecosystem, Fastify has the schema validation, and Hono runs everywhere. Here's the practical breakdown of all three so you can actually make the call.

PostgreSQL trades storage space for concurrency — MVCC, WAL, and vacuum aren't quirks, they're the design. Understanding this explains most performance mysteries.

Measured: pnpm cut three projects' node_modules from 132 MB to 42 MB and blocked a phantom import npm let through. The real difference is what that single architectural choice compounds into at scale.