OSes 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 memory allocations and 45 percent fewer function calls. She added that some optimizations "involve small or large breaking changes," so they will be 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 Windows more responsive.…