Web Performance Calendar » 5 tips to effectively optimize INP in React

In this post, let’s consider several optimization techniques for improving Core Web Vitals metrics for sites that are built with React. We are a team of speed consultants from the Czech Republic and in this article we would like to share some experiences from the many front-end performance optimizations we did for our clients. We will mainly focus on the Interaction to Next Paint (INP) metric, i.e. the response rate to interactions. Optimizing the speed of sites built on React involves optimizing JavaScript long tasks. They are closely related to how React works internally.