There is React application with implemented different css-in-js approaches:

• Aphrodite
• Emotion
• Fela
• Glamor
• glamorous
• JSS
• rockey
• styled-components
• styletron
• and example with React inline styles

Each bundle is lazy initializing (so for better results update page before test to keep initialized only current bundle). Also there are:

• Timers for rendering 4000 same components and 4000 different components with styles defined in JS.
• Checkbox to switch primary property
• Input to change text
• Links to source code of each bundle