Runs 5 JavaScript CPU sub-tests and scores your processor performance relative to typical browser benchmarks.
This benchmark measures how fast your CPU executes JavaScript workloads representative of real web application tasks. Unlike native benchmarks, JavaScript performance depends jointly on your CPU hardware and the quality of the browser's JavaScript engine (JIT compiler).
Each test is timed using performance.now() which provides sub-millisecond precision. Scores are normalized against a mid-range baseline, where a score of 50 represents average performance. Scores above 80 indicate excellent performance that exceeds typical benchmarks.
10 million integer additions with bitwise OR to force integer mode. Tests core ALU throughput and loop optimization.
5 million sin/cos pairs. Tests FPU throughput and transcendental math performance.
Eratosthenes sieve to 100K using Uint8Array. Tests memory access patterns and typed array performance.
Recursive Fibonacci(35). Tests function call overhead and stack performance with ~29M recursive calls.
1,000 JSON stringify/parse cycles on a complex object. Tests serialization performance relevant to API work.
More free tools to check your setup.
Stress test your GPU with a heavy Canvas animation of 500 moving circles. Monitor live FPS under load.
Benchmark your browser with Math, DOM, String, and Array performance tests. Compare your browser speed score.
Measure your browser's actual frame rate over 10 seconds using requestAnimationFrame. See average, min, and max FPS with a live bar chart.
Check browser memory usage and device RAM. View JS heap size, device memory, and run an allocation speed test.
Measure your browser-to-server round-trip latency with 10 pings. See average, min, and max response time in milliseconds.
Learn about processor benchmarking, JavaScript performance, and system optimization.
A data-backed look at 100 gaming mice across 125Hz to 8000Hz, with stability notes, real-world limits, and how to compare your setup using our mouse polling rate test.
A 2026 roundup of hardware testing tools, from browser-based no-install checks for mice and screens to GPU stress tests and system monitoring.
Web-based mouse polling tests measure browser-delivered pointer event frequency, not raw USB polling. Learn why ~125Hz appears, why high polling rates are indistinguishable on the web, and how to interpret results.
Think your PS5 DualSense has stick drift? Learn how to connect it to your PC/Mac, visualize stick input, set a deadzone, and confirm drift using our free browser-based PS5 controller test.
Learn the difference between CPS and CPM, what counts as a good click speed, and whether 10-second or 30-second tests are more accurate. Then run our free click speed test and share your results.
Learn what mouse polling rate (Hz) means, the real difference between 125/500/1000Hz, and how to test your mouse polling rate online using our browser-based distribution and stability checker.