Calculates 3,000,000 prime numbers locally to benchmark thread calculation speed.
Audit your system processor capabilities with our free CPU Cores tool. Inspect hardware concurrency, logical CPU thread allocations, and execute a local mathematical benchmark directly inside your browser with complete privacy.
Open the tool to trigger automatic navigator.hardwareConcurrency query.
Inspect reported logical processor threads and system concurrency limits.
Click Run Concurrency Speed Benchmark to execute prime math operations and view execution time.
Queries navigator.hardwareConcurrency for logical execution thread capacity.
Executes 3,000,000 prime number calculations in JavaScript to benchmark thread performance.
All calculations execute in local browser memory. Zero processor hardware specs leave your device.
The HTML5 Navigator property navigator.hardwareConcurrency exposes the number of logical processor cores available to run threads on the user device.
Modern central processing units (CPUs) leverage Simultaneous Multithreading (SMT or Hyper-Threading), enabling a single physical CPU core to execute two parallel threads simultaneously.
To mitigate browser fingerprinting tracking, user agents may round or clamp reported concurrency metrics. Local mathematical benchmarks help measure actual execution throughput without third-party plugins.