CSR Metrics
CSR Metrics refer to performance and user experience measurements for Client-Side Rendering (CSR) in web applications, where content is generated dynamically in the browser using JavaScript. These metrics help developers assess how efficiently a CSR application loads, renders, and becomes interactive for users. Common examples include First Contentful Paint (FCP), Largest Contentful Paint (LCP), and Time to Interactive (TTI), which are crucial for optimizing web performance.
Developers should learn and use CSR Metrics when building or maintaining single-page applications (SPAs) or other CSR-based web apps to ensure fast, responsive user experiences and meet performance benchmarks like Google's Core Web Vitals. These metrics are essential for identifying bottlenecks in JavaScript execution, network requests, or rendering that can degrade performance, particularly on mobile devices or slow networks. They guide optimization efforts such as code splitting, lazy loading, and caching strategies.