How to use this test
- Select test profile: Quick (5s) or Balanced (15s).
- Click 'Run CPU Benchmark'.
- Observe real-time thread calculation progress and worker completion.
- Review your local compute score and operations-per-second rating.
- Click 'Stop Benchmark' at any time to terminate workers.
How to understand your result
Looks good: All worker threads completed workloads without stalling UI thread.
Troubleshooting: what to try next
- Close heavy background tabs or streaming video before running benchmark.
- Laptops on battery may throttle CPU performance by 20-40% to conserve power.
What this test cannot tell you
Scores represent relative browser JavaScript engine performance, not universal bare-metal Cinebench ratings.
Frequently Asked Questions
No. The workload is strictly bounded in duration and calculation loops, stopping immediately upon completion or cancellation.
EP
Tested & Reviewed by [REAL AUTHOR NAME - OWNER TO COMPLETE]
Last Reviewed: 2026-10-17 • Test Method: Dedicated Web Worker parallel prime sieve calculation with high-resolution timing • How We Test