Microsoft has announced significant performance improvements for WinUI 3, the native framework for Windows apps, including a 25% speed improvement for the WinUI portions of File Explorer, 41% fewer memory allocations, and 45% fewer function calls. The improvements come as part of a broader push to make Windows more responsive, with plans to move more experiences to WinUI 3. However, the announcement is met with mixed reactions from developers, who have long complained that WinUI 3 is measurably slower than older frameworks like WPF and UWP. Some optimizations will initially be opt-in due to breaking changes. The post also touches on the historical tension between Microsoft's developer division and its Windows/Office teams around framework adoption.
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