7-Zip v25 File Archiver Released with Performance Gains

The latest 7-Zip release speeds up bzip2 by up to 40%, improves ZIP and FAT archive support, and fixes multiple bugs and security vulnerabilities.

7-Zip, the open-source file compression and extraction tool favored by countless users, has just released version 25 with a handful of performance-centric upgrades.

Foremost, the Windows build can now marshal more than 64 concurrent compression threads. Modern HEDT and server chips—think AMD’s 128-thread Threadripper PRO 7995WX or Intel’s Xeon w9 parts—are split by Windows into multiple “processor groups.” Prior releases were capped at a single group, effectively idling excess cores.

Version 25 dynamically distributes its worker threads across all groups, so every logical CPU can lend a hand when packing large zip, 7z or xz archives, and when running the built-in benchmark.

Moreover, speed-ups are now not limited to mega-core rigs. The bzip2 codec now processes data 15–40% faster, while classic deflate (used in .zip and .gz files) enjoys a 1–3% boost.

Beyond raw horsepower, 7-Zip quietly tightens its handling of several legacy formats. Support for ZIP, CcPIO, and FAT archives has been refined, smoothing edge-case extractions that previously required third-party tools.

Finally, the release rolls in unspecified bug fixes and vulnerability patches. Given the two zero-day disclosures that hit the project late last year, regular upgraders will welcome the extra peace of mind.

For more information, see the changelog.

Bobby Borisov

Bobby Borisov

Bobby, an editor-in-chief at Linuxiac, is a Linux professional with over 20 years of experience. With a strong focus on Linux and open-source software, he has worked as a Senior Linux System Administrator, Software Developer, and DevOps Engineer for small and large multinational companies.

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