Tutorials, React 19, Next.js App Router, LeetCode, and developer roadmaps.
A slow API does not automatically mean a slow database. Before rewriting queries or adding indexes, measure the entire request path and find exactly where the time is being spent.
A login button looks simple, but behind that click is a chain of validation, HTTP requests, database queries, password verification, authentication and protected resources. Let's follow the entire journey.
AI can write code faster than most beginners. That doesn't mean you should let it write everything. A better workflow is to make AI handle repetition while you keep control of the decisions.
Stop treating Next.js App Router like a traditional SPA. Here is how state boundaries actually work under the hood.
