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Your Node.js server calls res.send("hello") and somewhere, 1400 bytes cross the planet in 80 milliseconds and appear correctly in a browser. That's wild. But what actually happens?

One 'use client' at the top of your layout wipes out every performance benefit RSC offers. Learn how to push the boundary to leaf components and keep your server tree intact.

Bun is faster where the runtime layer is the bottleneck — startup, installs — and irrelevant where your database is. And the "native addons don't work" objection is out of date: Bun implements ~95% of N-API. How to make the call without repeating anyone's unsourced benchmark.

Next.js has the ecosystem and Vercel's backing. React Router has a cleaner model for interactive apps and a lighter client bundle. Also: "Remix 3" is now a different framework entirely — here's what that means for the choice.

HTTP/2 replaces ASCII text with a binary framing layer and multiplexes dozens of requests over one TCP connection. Here's what actually happens at the wire level.

Caddy gives you automatic HTTPS and a 4-line config. Nginx gives you raw throughput and a 25-year ecosystem. Here's when each one is the right call.

TLS isn't just a padlock — it's a carefully choreographed cryptographic handshake. Here's what actually happens between your browser and the server, with the openssl commands to see each step yourself.

MongoDB's flexibility vs PostgreSQL's relational power isn't ideology — it's a real tradeoff with performance implications. Here's how to actually decide.

Most teams hit 'use client' everywhere and wonder why their bundle explodes. The fix is a single mental model: keep the boundary as low as possible, and use composition to thread server-rendered content through client islands.