https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113504
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Jonathan Wakely from comment #7) > So the PSTL versions still use nearly twice as much memory as TBB and the > sequential sorts, but that factor is constant; it doesn't grow with the size > of the input. The PSTL version is also nearly twice as fast as TBB, so the additional memory seems like a good trade off.
