Microsoft has rolled out a new update for Windows 11 22H2 (KB5028185) that reduces stuttering when gaming with high-report-rate mice. This is a problem that Microsoft originally detailed in a May blog post that, while titled “Delivering Delightful Performance for More Than One Billion Users Worldwide,” explained how higher poll rates, such as 1,000 Hz, could result in “significant stutter” for Windows gaming. Microsoft’s new update also addresses an issue that could cause File Explorer to stop working, among other things.
We know gamers hate stutter, and we’re fixing issues throughout Windows so that an untimely frame-freeze won’t take gamers out of their immersive experiences. Gamers love to push their systems to the limit in search of the best experiences in-game. Many also use sensitive, high DPI, high report rate mice to shave milliseconds off their response times and increase precision. At the same time, the world of gaming is more connected than ever with gamers relying on an increasing number of background apps while playing, like voice chat, streaming, apps for configuring your keyboard, mouse, or graphics card, and more. The Windows input stack was being pushed to its limits with high report rate mice and their input being delivered to not just the game, but also multiple background processes. In turn, that caused a significant amount of time processing input rather than providing as many cycles as possible for rendering the game experience.
We set out to reduce the amount of processing time it took to handle input requests by throttling and coalescing background raw mouse listeners and capping their message rate. Prior to these changes, we observed on a Surface Laptop Studio with a 1000 Hz mouse, a test bed of background listeners, and popular games that there was significant stutter. After the improvements, on the same setup, we now deliver a smooth, uninterrupted gaming experience and preserve the low latency, high precision input experience in games while being efficient with input for background listeners!