Cosmopolitan Libc makes C a build-once run-anywhere language, like Java, except it doesn't need an interpreter or virtual machine. Instead, it reconfigures stock GCC and Clang to output a POSIX-approved polyglot format that runs natively on Linux + Mac + Windows + FreeBSD + OpenBSD + NetBSD + BIOS with the best possible performance and the tiniest footprint imaginable. For further details, read Cosmopolitan Third Edition, the Cosmo README, and the Cosmopolitan Toolchain README.

Improvements

This release makes dlmalloc scalable and zlib crc32 faster. Enterprise server applications that employ many threads on many cores can now look upon Cosmopolitan as a serious and viable option for their needs.

• 3609f65de3 Make malloc() go 200x faster
• a05ce3ad9d Support avx512f + vpclmulqdq crc32() acceleration

This release fixes some showstopper issues on Windows.

• e4d25d68e4 Drop support for Windows 8
• cd672e251f Improve crash signal reporting on Windows
• f31a98d50a Fix bug with realpath() on Windows
• 2816df59b2 Increase tinymalloc granularity

This release brings a more modern standard library for C++. It compiles slower, but in certain cases that can be worked around since it defines "breakout" headers for individual functions, e.g. std::move(). Since it goes so slow, we're experimenting with creating our own STL replacement

• 8e68384e15 Upgrade to 2022-era LLVM libcxx
• 4937843f70 9906f299bb Introduce Cosmopolitan Templates Library (CTL)

Our --ftrace function call logger now demangles C++ symbols. This is thanks to revisions we've made to our FreeBSD demangler that makes it lockless and reentrant so it's safe to call from signal handlers. It's not as good as the libcxxabi demangler, but that doesn't make it unimpressive. For example, calling kprintf("%t", sym) successfully demangles 90% of the symbols in the llamafile codebase. Usually when it doesn't work, it's because a symbol is very very long. Since it's run when nops are hooked in function prologues, it has to be part of the privileged cosmo runtime, which is highly constrained and can only use fixed size stack buffers.

• 165c6b37e2 9aa353d88b 2ca491dc56 b003888696 Add C++ demangling to privileged runtime
• 9b6718ac99 Improve backtraces

Additional improvements:

• 7c8df05042 Improve -march=native micro-architecture detection
• b74b974cfd Introduce #include <tinygetopt.h>
• 4c77acdfcf Add LoadZipArgs() to <cosmo.h>
• fae1c32267 Encode ±INFINITY as ±1e5000

Finally, this release sunsets the cosmopolitan amalgamation.