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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/92546] Large increase in preprocessed file sizes in
 C++2a mode
Date: Thu, 08 Apr 2021 08:47:21 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D92546

--- Comment #19 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #16)
> <functional> includes <vector> so std::boyer_moore_searcher can use
> std::vector, but it doesn't need it at all. Using std::unique_ptr<T[]> wo=
uld
> do fine.

We can't change that now though, because the C++17 ABI is stable. I have a
patch for a lightweight vector that is ABI compatible though, so we could u=
se
that.=