No, they do not "frequently just call out to C libraries".
2 of 10 (pidigits and regex-redux) allow use of widely available third party libraries — GMP, PCRE, RE2 — because there were language implementations that simply wrapped those libraries.
Cool! I didn’t see it before, maybe because I mostly use the language vs. language feature. There is no such section there, but it would be very helpful IMO, instead of clicking every solution to check which one is intrinsics free.
Well, it's your site, so you can do what you want with it, but I don't believe what you just wrote is logical at all. Sometimes, you just want to see, in general, how one language compares to another when one uses intrinsics and the other doesn't, without having to click through every single benchmark across multiple versions to find one without intrinsics. This is just bad UX and waste of time.
Look at all the programming language implementations that provide big integers by calling out to GMP. Why would it be "cheating" when available to all and done openly? Libraries matter.
>Most the Debian benchmarks for C# are cheaty too.<
In any case, because the charts are frequently cut & pasted out-of-context they should not include pi-digits and regex-redux data. Now they don't, so thank you.
If you don't think it's appropriate to compare the pi-digits and regex-redux programs, simply ignore them and compare the other 8!
2 of 10 (pidigits and regex-redux) allow use of widely available third party libraries — GMP, PCRE, RE2 — because there were language implementations that simply wrapped those libraries.