Almost every developer learns early that adding an index makes queries faster, and almost every developer has at some point added one that did nothing at all. Indexes are one of the highest-leverage tools for performance, but they are also…
Rate limiting tends to arrive late in a project’s life, usually the day after an automated script hammers an endpoint, a bill spikes, or a single misbehaving client takes the whole service down for everyone else. Bolted on in a…
There is a comfortable assumption baked into much of modern web development: that JavaScript will always run, always finish, and always work. On a fast laptop with a good connection and a fresh browser, that assumption holds often enough to…