[Bug libstdc++/96942] std::pmr::monotonic_buffer_resource causes CPU cache misses

[amonakov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96942

--- Comment #23 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Are you benchmarking with bt_pmr_0thrd (attached in comment #3) with depth=18?
On earlier tests there are other effects in play too.