Windows 10 has seen several improvements over its predecessors in games performance. And looks like it is set to receive yet another significant improvement.
Famous software expert account WalkingCat (@h0x0d) was the one who first discovered a system file in the latest preview build of Windows 10. The file, gamemode.dll, is built to adjust Windows 1 resource allocation logic (for CPU/Gfx etc.) to prioritize the currently running game when the still-unannounced "Game Mode" is turned on.
.@h0x0d looks like Windows will adjust its resource allocation logic (for CPU/Gfx etc.) to prioritize the "Game" when running in "Game Mode"
— WalkingCat (@h0x0d) December 28, 2016
Simply put, game mode will give prioritize resource allocation to the current game. So if you have a browser window and a torrent application running in the background while you play, the game will have faster access to the RAM than the browser and its network traffic will have higher priority than that of the torrent application.
Unfortunately, there is no telling when game mode will make its way to the general public. Some Windows 10 features have remained in the preview program for nearly a year while other made their way out in a couple of weeks. In fact, it is quite possible that the features might be canceled altogether but this remain a slim chance.
The next major Window 10 update, The Creators Update, will be released around March 2017 and will focus on augmented reality, virtual reality and 4K HD support. Game Mode seems like a nice fit for such an update, but - again - there are no guarantees until an official announcement is made.