Comprehensive CPU and performance benchmark using JavaScript. Test computational speed, memory allocation, array operations, and mathematical calculations. Compare performance across different devices and browsers. Useful for performance optimization and hardware comparison.
JavaScript performance varies significantly between browsers and devices. Modern browsers use Just-In-Time (JIT) compilation to optimize JavaScript execution, with some browsers achieving near-native performance. This benchmark helps you understand your device's actual computational capabilities.
Start with the live tester below. Supporting details, FAQs, and troubleshooting guidance are placed after the tool so the main action is easier to find and use immediately.
Benchmark your device's JavaScript execution speed and memory usage.
Common problems
If the live tester does not behave as expected, these are the first checks most users should try before assuming the hardware is broken.
Close other applications for accurate results
Test multiple times for average performance
Compare results across different browsers
Test on different devices to compare performance
Comprehensive CPU and performance benchmark using JavaScript. Test computational speed, memory allocation, array operations, and mathematical calculations. Compare performance across different devices and browsers. Useful for performance optimization and hardware comparison.
JavaScript performance varies significantly between browsers and devices. Modern browsers use Just-In-Time (JIT) compilation to optimize JavaScript execution, with some browsers achieving near-native performance. This benchmark helps you understand your device's actual computational capabilities.
Test your keyboard input, detect dead keys, and verify all keys are working correctly.
Test mouse buttons, scroll wheel, pointer tracking, and touch input.
Test your microphone input levels in real-time. Verify microphone is working.
Test your speakers or headphones with reference tones.
Helpful questions
Use these answers to understand results, browser limitations, permissions, and sensible next troubleshooting steps.
Open the live cpu & performance test on this page and follow the prompts shown in the tester area. The tool runs directly in your browser, so you can check your device without installing additional desktop software or signing in.
Check browser permissions, confirm the device or browser feature is enabled, and reload the page if needed. Many browser-based testers depend on permission prompts, secure context support, or hardware access that must be approved before the test can run fully.
Hardware comparison - compare CPU performance. It can help you confirm whether the issue is caused by the hardware itself, a browser permission setting, or a system configuration problem before you spend more time debugging.