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⇱ Valkey 9.0-rc1 Taps AVX-512 For String-To-Integer Conversion For ~19% Gain - Phoronix


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Valkey 9.0-rc1 Taps AVX-512 For String-To-Integer Conversion For ~19% Gain

Written by Michael Larabel in Programming on 14 August 2025 at 04:46 PM EDT. 6 Comments
The open-source Valkey key-value database that is forked from Redis is preparing for the big Valkey 9.0 feature release. Valkey 9.0-rc1 was issued today and comes with some exciting performance optimizations and other enhancements for this in-memory KV database.

One of the optimizations in Valkey 9.0 is this merge optimizing the BITCOUNT command using AVX2. With this SIMD AVX2 optimization for a 1MB value size it's as much as a +514% change while for smaller 4KB value sizes is arorund a 10% improvement or +116% at 64KB.

👁 Valkey AVX2 benchmark


Valkey also added optimized string-to-integer performance and there it's relying on AVX-512 instructions. With that AVX-512 usage for string-to-integer conversions it's seeing a 17~19% performance boost.

👁 Valkey AVX512 benchmark


Valkey 9.0-rc1 also brings better replication stability, support for using ARM NEON SIMD for optimized BITCOUNT, SSE2 SIMD for faster "findBucket" performance up to 6%, and a variety of other performance optimizations.

Some of the new features coming for Valkey 9.0 include multi-database support for the cluster mode, Multi-Patch TCP (MPTCP) support, atomic slot migration, and more.

Downloads and more details on the Valkey 9.0-rc1 release via GitHub.

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.