An unscientific collection of tests measuring CSS rendering performance for different selectors, properties, and layout techniques.
css-perf is an archived experimental project that measures and compares the rendering performance of different CSS techniques. It tests various CSS strategies—like attribute vs. class selectors, box-sizing resets, grid layouts, and background properties—to help developers understand which approaches are faster in browsers like Safari and Chrome. The project provides unscientific but insightful data to guide CSS architecture decisions.
Frontend developers and CSS architects interested in optimizing rendering performance and comparing the efficiency of different CSS methodologies. It's particularly useful for those building large-scale web applications where CSS performance impacts user experience.
Developers use css-perf to gain practical, albeit unscientific, insights into CSS performance trade-offs without relying on complex benchmarking tools. Its straightforward test cases and clear comparisons help inform decisions about selector usage, layout techniques, and property choices in real-world projects.
Archived. Derping around with measuring CSS performance.
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Tests clear, focused scenarios like attribute vs. class selectors and box-sizing resets, providing tangible data points for CSS architecture discussions.
Includes averaged page load times across multiple runs, offering more consistent insights than single tests and reducing variability.
Openly admits limitations and explains the local, unscientific testing process, helping users critically interpret the results.
Project is no longer maintained, with tests based on old browser versions (Safari 7.0.1, Chrome 33), making findings potentially irrelevant for modern development.
READMe explicitly states tests are 'completely unscientific' with wildly varying results, such as in box-sizing resets, undermining reliability for decision-making.
Focuses on synthetic stress tests with duplicated elements, not reflecting typical web pages with diverse content, interactions, or CSS complexity.