Compress-Raw-Zlib has an option to use zlib-ng to provide a significant performance boost. sys-libs/zlib-ng is available in the repos, so a USE flag to link against it would be very nice. Reproducible: Always
Aaaactually, let me deprioritize this request in favor of #905376, which is more ambitious but offers a far more general solution. I ended up using libdeflate instead for the immediate use case I had in mind when opening this issue, so, while a faster Compress::Raw::Zlib might still offer benefits elsewhere, it's likely not worth spending time to optimize just this one case. *** This bug has been marked as a duplicate of bug 905376 ***