Why glibc's fstat() is slow

Every time I see "this is to simplify code" I flinch. People so often lose the sight of what they are doing: any software project is producing software to be used by the users, and that's the main goal. The secondary, subordinate, goal is to make the developers' lifes as easier as possible. For such a fundamental library as libc any inefficiency is multiplied gazillion times every day. In my opinion it is cruel to put developers' time above users' in this particular codebase.

Admittedly, C is such a footgun that sacrificing some performance in some rare corner cases to significantly decrease amount of code is acceptable, but selecting one syscall over another in stat, is it really so complicated?

P.S: I'm not ordering anyone to do anything, I'm posting my observations and describe attitude I try to put into my work. I thank all maintainers who put their work into the code we all benefit from, often without renumeration and in their spare time, and I try to pay it back in kind.