mgorny added a comment.

In D90863#2376742 <https://reviews.llvm.org/D90863#2376742>, @emaste wrote:

> Does Linux fetch each time also?
> I agree it's probably not worth the effort.

Yes. However, their logic is simpler (it boils down to opening a dedicated file 
in procfs (i.e. they don't have to iterate over all threads). Nevertheless, I 
don't think this is called frequently enough to justify optimization at this 
point.


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https://reviews.llvm.org/D90863

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