One should probably point out that the library/readme is not the only suspicious thing. The author often has huge problems with terminology and/or communication in general. He routinely confuses output with formatting, which might explain some of the "benchmark results".

[1] https://www.reddit.com/r/cpp/comments/dc5t1n/reply_to_herb_s...

[2] https://www.reddit.com/r/cpp_questions/comments/efuemt/c_wit...

[3] https://www.reddit.com/r/cpp_questions/comments/f7zgat/why_d...