Uncapped FPS
A hook on the game's swap chain holds any FPS limit exactly while the CPU idles, and a frame reaches the screen about 1 ms after the game read your mouse (median at 144 FPS, down from 13.6 ms). The bundled Chromium is patched against the aim freeze (in our stress test stock Chromium stalled for 7.5 s, Kute for at most 30 ms) and the stutter other uncapped clients get when the GPU is the limit.