AlexWebLab

Explore a wide range of web development topics, from JavaScript to React and beyond, and uncover valuable insights to enhance your skills.

Latest 2 articles:

Largest Contentful Paint: What It Measures and How to Improve It

Performance

Largest Contentful Paint is Google's primary metric for perceived load speed. It measures when the biggest visible content element finished rendering — and it is one of the most impactful Core Web Vitals for both user experience and search ranking.

Cache Invalidation Strategies: The Second Hardest Problem in Computer Science

Networking & Caching

Caching makes applications fast. Cache invalidation makes them correct. The challenge is not storing data — it is knowing when stored data is no longer fresh and deciding what to do about it. Every caching strategy is a trade-off between freshness, performance, and complexity.