This suite compares the performance characteristics of CSS Modules and Styled Components in React applications. Each test runs identical scenarios using both styling approaches to help you make informed decisions about styling solutions.
Note that results can vary between runs due to system load, browser state, and other environmental factors. These results represent general performance trends rather than absolute measurements.
Measures how quickly a page loads and renders its initial content. Compares first-paint performance and setup overhead between CSS Modules and Styled Components.
Tests how fast the application becomes interactive after server-side rendering. Compares hydration performance between CSS Modules and Styled Components.
Measures performance when frequently updating individual CSS properties. Compares both approaches for animations and interactive UI elements.
Tests how quickly styles can be switched between different variants. Compares both approaches for theme switching and state-based styling.
Measures the overhead of creating and mounting new styled elements. Compares both approaches for dynamically generated UIs.
Tests performance with deeply nested components. Compares both approaches for complex layouts and component hierarchies.
Measures performance with many sibling components. Compares both approaches for rendering large lists, grids, and data-heavy UIs.
Based on the performance tests above, CSS Modules consistently outperformed Styled Components across all metrics: