A CDN speeds up static content worldwide, but it wont fix every slow site. Learn when a CDN actually helps, when it wont, and how to configure it correctly.

When a page feels slow, the instinct is to reach for a faster server or a bigger CDN plan. But raw bandwidth is rarely the bottleneck on modern connections. The real cost is the number of round trips the browser…

Layout shift jumps content while users read. Learn what causes CLS and how to fix it with size attributes, reserved space, and smarter font and ad loading.

Web fonts can delay your text and hurt speed. Learn how to fix slow font loading with font-display, subsetting, and preloading for faster, readable pages.

Timestamps look like one of the simplest things a program has to deal with. A moment happens, you write it down, you read it back later. Yet few decisions cause more subtle and long-lived bugs than how a team chooses…

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…