PerformancePerformanceNext.js
Why Your Website Is Slow: The 7 Real Causes and What to Actually Fix
Slow is not a cause — it is a symptom. A website can be slow for a dozen different structural reasons, and the fix for each one is completely different. Applying the wrong fix wastes time and money while the real problem stays in place. This post identifies the 7 most common causes of slow websites in 2026: late LCP image discovery, render-blocking JavaScript, oversized images, slow TTFB, third-party script bloat, font loading, and CDN misconfiguration.