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[LLVM libc++] A size-based representation for vector in the unstable ABI
https://github.com/llvm/llvm-project/commit/bd338806e423

https://redd.it/1upo87m
@r_cpp
GitHub [libc++] Add a size-based representation for `vector` in the unstable… · llvm/llvm-project@bd33880 … ABI (#155330) This commit adds an alternative representation for `std::vector` in a similar manner to `__split_buffer` in #139632. This alternative representation was measured to provide signifi...
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