[Bug libstdc++/94268] std::filebuf is extremely (at least 10x) slow on windows compared to Linux. Even much slower MSVC STL with terrible ABI.

[euloanty at live dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94268

--- Comment #2 from fdlbxtqi <euloanty at live dot com> ---
The hacking code is here.

https://bitbucket.org/ejsvifq_mabmip/fast_io/src/reserver_test/include/fast_io_legacy_impl/cpp/libstdc%2B%2B_libc%2B%2B.h
https://bitbucket.org/ejsvifq_mabmip/fast_io/src/reserver_test/include/fast_io_legacy_impl/cpp/general.h
https://bitbucket.org/ejsvifq_mabmip/fast_io/src/reserver_test/include/fast_io_legacy_impl/cpp/streambuf_io_observer.h