7-Zip update delivers HUGE performance gains
7-Zip’s latest update has delivered major compression performance gains
7-Zip, the free and open-source file archiving tool, has just received a major performance update. With version 25.00, 7-Zip has received several improvements that should make its compression techniques faster.
For starters, 7-Zip’s Windows version now supports more than 64 CPU threads for compression workloads. While this change will not have a significant impact on most mainstream users, it should substantially improve 7-Zip’s performance on systems with large CPU core/thread counts. This is especially true for users of AMD’s Threadripper series CPUs. Right now, AMD’s top Threadripper CPU has 96 cores and 192 threads.
Other improvements include changes to bzip2 compression, which has been increased by 15-40%. This improvement will impact all 7-Zip users, accelerating compression performance. Additionally, deflate (zip/gz) compression has been boosted by 1-3%. This is a minor boost, but every little helps.
7-Zip Version 25.00 – 2025-07-05
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– 7-Zip for Windows can now use more than 64 CPU threads for compression
to zip/7z/xz archives and for the 7-Zip benchmark.
If there are more than one processor group in Windows (on systems with more than
64 cpu threads), 7-Zip distributes running CPU threads across different processor groups.
– bzip2 compression speed was increased by 15-40%.
– deflate (zip/gz) compression speed was increased by 1-3%.
– improved support for zip, cpio and fat archives.
– fixed some bugs and vulnerabilities.
7-Zip is an incredibly popular tool. This makes the tool’s performance gains a big deal for the overall PC community. Note that version 25.00 also “fixed some bugs and vulnerabilities.” This should make this update a must-download for 7-Zip users, as it implies that older versions of the app have a vulnerability that has now been patched.
You can join the discussion on 7-Zip’s performance-enhancing update on the OC3D Forums.
