Seven Common Developer Mistakes That Make Websites Load Slowly

Slow websites frustrate users and can hinder important actions, even when their content and features are strong. Many performance issues stem from a few recurring development errors. Oversized images are a major culprit, and remedies include modern formats, proper resizing, compression, and lazy loading for content below the fold. Excessive JavaScript also slows pages, especially on weaker devices, so developers are advised to remove unused dependencies, split bundles, and load features on demand. Poor caching forces repeat downloads of unchanged resources, which can be avoided with suitable Cache-Control headers for static assets, while redundant or sequential API calls can be reduced by running independent requests concurrently.