Basic CPU Benchmark 0.2a is a free CPU command-line benchmarking tool developed by Krystone in 2025 for Windows.

This benchmark measures CPU performance using a synthetic workload that performs a series of arithmetic operations over a fixed number of iterations. It provides both single-threaded and multi-threaded performance metrics, reported as operations per millisecond (op/ms).

Single-Threaded Benchmark:

The code times a single call to the workload function over 1 billion iterations. It computes the score as the number of iterations divided by the elapsed time in milliseconds. This gives a single-threaded performance in operations per millisecond.

Multi-Threaded Benchmark:

The program detects the number of logical processors using GetSystemInfo(). It then creates that many threads, each performing the same 1-billion iteration workload. The multi-threaded score is calculated based on the total iterations executed by all threads divided by the elapsed time, resulting in the multi-threaded performance in operations per millisecond.

Result:

It's just a number used to simplify comparing the results.

Usage:

Just run bench.exe, or if would like your results stored in a text file you can do: bench.exe > results.txt

Author's Website: 

https://krystone.pl