Benchmarks performance for both browser and native styled-components. Also benchmarks cssta.

To benchmark,

npm install
npm start

Under tests, there are files for each platform we test: currently browser and native. Each platform test file has a default export of an object whose keys are the test names. The values are objects keyed by the project name (currently styled or cssta), and the values of these objects are test functions. You do not need to add tests for every project.

export default {
  'test name': {
    styled: () => {
      /* Test function body */
    }
  }
}

Tests are usually formed by creating a component, and running it through react-test-renderer.

const Component = styled.div`
  color: ${props => props.color};
`;

const instance = render(<Component color="black" />);
instance.update(<Component color="red" />);

All tests are compiled using webpack. React uses production-mode optimisations, and the output is minified. Cssta also has production-mode optimisations.

Tests are benchmarked using Benchmark.js, so are run multiple times. If your test uses a global cache, you should clear the cache before running it.