Geekbench
Geekbench  is a cross-platform utility for benchmarking the central processing unit of computers. Geekbench began as a benchmark for Mac OS X and Windows and was created by John Poole who ran the now-defunct Geek Patrol website, which reviewed hardware and software designed for Macs, and featured editorials and interviews of interest to the Mac community.

History
Starting with version 4, Geekbench also measures GPU performance in areas such as image processing and computer vision.

Starting with version 5, Geekbench is 64-bit only.  Versions prior to 5 performed benchmarking for both 32-bit and 64-bit systems.

Usage
It uses a scoring system that separates single-core and multi-core performance, and workloads that supposedly simulates real-world scenarios. The software benchmark is available for macOS, Windows, Linux, Android and iOS.

The usefulness of Geekbench scores from earlier versions (up to Versions 3) were heavily disputed by Linus Torvalds because Geekbench combined disparate benchmarks into a single score. Later revisions starting with Geekbench 4 addressed these concerns by splitting integer, floating point, and crypto into  sub-scores, which while Linus regards as improvements, still notes that they can be misleading and can be gamed to artificially inflate one CPU platform over another.

References

External links
 

Benchmarks (computing)