Geometric mean over their "fastest measurement at the largest workload" data set actually shows that Rust is faster than C in this benchmark

Please share!

If true, can you say the difference is not due to chance?

(fwiw the GM that I see — whether the scores are based-on elapsed secs, cpu secs or "busy" secs — are a little slower for the Rust programs.)

Perhaps the median score of the Rust programs is faster?

For what it worth, it is more accurate to bench on your own machine, you may find a different or interesting outcomes such as error and slower in Rust.