artagnon wrote:

> > his is a nice-to-have that does not degrade compile time, as the iterator 
> > is never used.
> 
> It looks like the compile-time tracker shows a +0.10% for stage2-O3 AFAICT?

Yeah, not sure what it means: does it mean that clang is not optimizing away 
the find from the first member of the pair on O3, while gcc is? Seems a bit 
surprising, as it's just straight-forward DCE?

https://github.com/llvm/llvm-project/pull/232372
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