They do explain it very clearly though, and give a reason why that is what they are interested in for business purposes. Benchmark and optimise for what you're running, right? Better than a Mandelbrot?
Yeah, but they're just benchmarking a wrapper around gzip. It looks to be around 300 LOC and does very little.. It's a bit deceptive. A large table of benchmarks across different domains and workloads would be more honest.