May 14, 2026
Windows glow-up or too little, too late?
WinUI 3 Performance: A Leap Forward
Microsoft says WinUI is finally faster, and the crowd is shocked, hopeful, and still side-eyeing it
TLDR: Microsoft says its newer Windows app toolkit is getting much faster, which could make built-in apps feel snappier. Commenters were split between cautious applause and old-school cynicism, with many arguing the bigger issue is Microsoft still hasn’t convinced everyone to bet on Windows-only app building.
Microsoft just dropped a very specific flex: its newer Windows app system, WinUI 3, is getting noticeably faster, with fewer memory grabs, fewer internal steps, and less time spent doing its own work when apps like File Explorer open. In plain English, the company is promising snappier Windows apps and saying the newer system should finally feel like an obvious upgrade. But the real fireworks were in the crowd reaction, where the vibe was less standing ovation and more "wait… now you care about quality?" One commenter basically delivered the thread’s winning eyebrow raise with, "Color me surprised", summing up the mix of relief and long-held distrust.
Then the debate split into camps. Team Optimist begged Microsoft to go all-in and stop scattering Windows development across a million directions. Team Skeptic asked the painful question: why build for one operating system at all when cross-platform tools already exist? That turned the discussion into a mini culture war over whether native Windows apps are the future or just another walled garden. And because no software thread is complete without a wishlist, people also tossed in side quests: bring it to Mac, make a plain C interface for other languages, and please, for the love of developers, where is F# support? The humor was dry, the trust issues were loud, and the comments made one thing clear: faster apps are nice, but the community wants proof, commitment, and maybe fewer framework identity crises.
Key Points
- •Microsoft says improving WinUI 3 performance is a priority so that it becomes the best native UI platform for Windows apps and a clear performance upgrade over WinUI 2.
- •The work is tied to a broader quality effort that includes reducing interaction latency by moving core Windows experiences to the WinUI 3 framework.
- •Current optimization focus is launch time, with File Explorer and Notepad used as primary benchmarks.
- •For the WinUI portion of File Explorer launch, Microsoft reports 41% fewer allocations, 63% fewer transient allocations, 45% fewer function calls, and a 25% reduction in time spent in WinUI code.
- •The changes are expected to move soon into winui3/main and, where feasible, into WinAppSDK 2.x, with some optimizations requiring app opt-in because they introduce breaking changes.