* Ali Erdinc Koroglu:
I'm gonna submit a change proposal to replace zlib to zlib-ng for F41 or F42 but I don't think that even CentOS Stream 11 or RHEL11 can use that. So what I'm offering is since we did not brake any API/ABI in Zlib, AVX2 deflate optimization applicable for CentOS ISA SIG x86-64-v3
I think zlib-ng has a build mode that is supposed to be ABI-compatible. We have plans to evaluate that at Red Hat. If it's indeed compatible, we can just swap it out in a Fedora release and consider what to do next.
We currently carry some zlib patches with architecture-specific optimizations, but the original upstream is not willing to take those patches, and the various downstream patches cause maintenance issues. The presence of IFUNC resolvers introduces crashes into some third-party applications because these symbols are frequently interposed, causing relocation ordering problems.
Thanks, Florian