Microsoft has released Windows 11 Build 22449 on the Dev channel, and it is making the usual many tweaks and changes. One of them is the change in SMB compression behavior which will speed up file transfers over the local network.
Windows 11 Build 22449 adjusts SMB compression
Many small changes and bugfixes have been introduced with this update (and probably new bugs to be introduced), but what catches our attention is the change in Server Message Block (SMB) compression behavior. Microsoft first introduced SMB compression with Windows 11. Basically, it is designed to speed up file transfers over a local network.
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Microsoft describes SMB compression as a feature that “removes the need to first deflate a file manually with an application, copy it, and then inflate it on the destination PC.” As a result, compressed files will consume less network bandwidth and take less time to transfer, at the cost of slightly increased CPU usage during transfers.
Windows 11 did not always use SMB compression for small files that could be compressed, so Microsoft is changing the behavior to make files so much smaller that the functionality would typically not shrink will now receive compression. This should speed up local file transfers for small and medium files, as they will get all the benefits of SMB compression.
When a file transfer was initiated, the SMB decision algorithm compressed the first 524,288,000 bytes (500MB). Then it would verify that at least 104,857,600 bytes (100MB) were compressed into that 500MB range. If so, it would continue. If not, the compression would stop. From now on, this decision algorithm will no longer be in place and will attempt to compress all files for faster transfers, regardless of their size.
Other updates with Windows 11 Build 22449
Microsoft has also changed the Start screen to show a progressive ring animation for loading the operating system instead of an animated circle of dots. While it certainly isn’t a game-changer, it looks a bit prettier.
Additionally, Microsoft makes it faster to open the Bluetooth & devices page in Settings from the context menu. There’s also an acrylic background for notifications, a link to touch keyboard customization settings, and more.