WinUI Archives

Winsage

May 13, 2026

Former Windows boss reveals why modern Windows 11 apps feel slower, says Microsoft once gave every engineer a stopwatch

Steven Sinofsky, former head of the Windows Division at Microsoft, discussed the company's engineering culture and its focus on resource management from 1980 to 2000, where every engineer was given a physical stopwatch to measure various performance metrics. This practice emphasized optimizing software for speed and efficiency, a stark contrast to modern applications that consume significant RAM due to shifts in market dynamics and hardware advancements. The current trend prioritizes rapid feature deployment over optimization, leading to performance issues in applications. Microsoft is responding to criticism by enhancing the performance of Windows 11, focusing on native desktop applications and optimizing core components, including the Start menu and File Explorer. They are also testing new CPU scheduling profiles to reduce micro-lags during user interactions.

Winsage

May 13, 2026

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

Microsoft has announced a 25 percent improvement in the performance of WinUI 3, specifically in File Explorer components. There has been a 41 percent reduction in memory allocations and a 45 percent decrease in function calls. Some optimizations may involve breaking changes, which will initially be optional for developers. The enhancements are intended to become the default in future iterations of WinUI and the Windows App SDK. Despite these improvements, developers have expressed concerns about WinUI 3's performance, noting it is slower than WPF and UWP. The reliance on WinRT interop for component actions is seen as a significant factor hindering speed. Additionally, there are historical tensions regarding the adoption of Microsoft's frameworks within the Windows and Office teams, leading to skepticism about their reliability.