Interesting - I didn't know the site gave those numbers at all. Obviously they are not the ones in the main comparisons.

Something seemed a bit weird with those numbers to me. My heavily loaded 2015 MacBook Air, which is also overheating, took <5s to compile nbody with the same Rust version and command line. The ratio remains about the same though - a similar GCC version is also much faster. Turns out, the hardware is really, really old ("Measured on a quad-core 2.4Ghz Intel® Q6600® with 3.8 GiB of RAM and 250GB SATA II disk drive; using Ubuntu™ 19.10 Linux x64 5.3.0-29-generic.").