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

[dmitriy.ovdienko at gmail dot com]

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

--- Comment #1 from Dmitriy Ovdienko <dmitriy.ovdienko at gmail dot com> ---
Created attachment 49184
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49184&action=edit
Original implementation with preallocated buffer