TECH NEWS

Microsoft aims to speed Windows with 'leap forward' in WinUI 3 perf

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Bittersweet post tells devs what they already knew: The framework is too slow

Microsoft claims to have achieved a "leap forward" in performance for WinUI 3, the current native framework for Windows apps, with a 25 percent improvement for the parts of File Explorer coded using this framework.

Software engineer lead Beth Pan posted figures for the WinUI portion of File Explorer, showing 41 percent fewer memoryallocations and 45 percent fewer function calls. She added that someoptimizations "involve small or large breaking changes," so they willbe opt-in at first for developers using the framework. The plan is for the optimizations to become the default in future versions of WinUI and the Windows App SDK,with opt-out available when needed.

WinUI 3 is currently measurably slower than both WPF and UWP… this is NOT OK

The new optimizations are part of a push to make Windowsmore responsive. In March, Windows boss Pavan...

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