VOOZH about

URL: https://www.phoronix.com/news/Zlib-rs-VNNI-Adler32

⇱ New Zlib-rs Delivers More Performance With AVX-512 VNNI Adler32 Implementation - Phoronix

👁 Phoronix

New Zlib-rs Delivers More Performance With AVX-512 VNNI Adler32 Implementation

Written by Michael Larabel in Free Software on 2 March 2026 at 08:19 AM EST. 1 Comment
Zlib-rs as the Rust programming language implementation of Zlib from the Trifetca Tech Foundation is out with a shiny new release (actually, releases) today.

Zlib-rs 0.6.1 was released today with a variety of bug fixes, fuzzing enhancements, and other improvements to the codebase. What I found most interesting with Zlib-rs 0.6.1 was a VNNI Adler32 variant. The AVX-512 VNNI implementation is faster than the AVX-512 baseline code found in prior Zlib-rs releases. The merge request noted some pretty significant improvements:

👁 VNNI benchmarks


Intel Xeon CPUs since Cascade Lake and all AMD CPUs since Zen 4 support AVX-512 VNNI.

The Zlib-rs developers didn't stop with v0.6.1 today. Following that was already zlib-rs 0.6.2 as a brown paper bag release to fix overflows happening in the deflate code. Zlib-rs 0.6.3 also arrived today with additional fixes. The motivator here was a bug in the deflate output not being deterministic when the compressor is reused with deflateReset. This bug also turned out to impact zlib-ng, which has addressed the issue and so has zlib-rs now too.

Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via MichaelLarabel.com.