Once in a while a new library comes up and talks how they are high performance, but that's only because they are new and naive. Not many people know about it, so they are allowed to skip on ahead with shortcuts. They've benchmarked and benchmarked, then that effort goes to the wayside as soon as reality catches up. Bugs appear left and right and now they have to value correctness over performance. More people see the old benchmarks and are fooled into thinking, yeah must be fast. Eventually, people do their own benchmarks and find the benchmarks are out of date and the library does not live up to its promise, boom there's a new shiny thing, faster than X! The cycle repeats and the original maintainer "has moved on" now that the fraud has been exposed.
Never trust benchmarks I say, trust your own and fortunately, I use the libraries I make.