Crushing Total Blocking Time (TBT) in React: A 2025 Performance Guide
·1701 words·8 mins
If you are a React developer in 2025, you know the landscape has shifted. We aren’t just chasing fast load times (LCP) anymore; we are chasing responsiveness. With Google’s Core Web Vitals fully cementing Interaction to Next Paint (INP) as a critical metric, Total Blocking Time (TBT) has become the most important lab metric you need to watch.