1. # Test fixture for `packages/react-devtools-scheduling-profiler`
    
  2. 
    
  3. 1. First, run the fixture:
    
  4. ```sh
    
  5. # In the root directory
    
  6. # Download the latest *experimental* React build
    
  7. scripts/release/download-experimental-build.js
    
  8. 
    
  9. # Run this fixtures
    
  10. fixtures/devtools/scheduling-profiler/run.js
    
  11. ```
    
  12. 
    
  13. 2. Then open [localhost:8000/](http://localhost:8000/) and use the Performance tab in Chrome to reload-and-profile.
    
  14. 3. Now stop profiling and export JSON.
    
  15. 4. Lastly, open [react-scheduling-profiler.vercel.app](https://react-scheduling-profiler.vercel.app/) and upload the performance JSON data you just recorded.