Windows 10 Fixing Windows 10 Creators Update gaming performance issues

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After months of reports from users, Microsoft seems to have finally acknowledged the issue. As it turns out, there’s some sort of bug in the Windows 10 Creators Update that’s causing the FPS drops.

Some users are seeing game related performance issues after installing the Creator's update.
Disabling the Xbox Game DVR feature has proved to be a solution for some users and Microsoft have said that a fix is due for release probably with the Fall Creators Update.
Reference:
Microsoft finally gets around to fixing Windows 10 Creators Update gaming performance issues - MSPoweruser

 

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More on the Creator's update 'gaming bug'

In the post, Microsoft Engineer, Paul Aaron, acknowledged the issue and thanked those who submitted feedback to the Feedback Hub. He revealed a fix has been deployed to a Fast Ring build:

Thanks to all of you who provided feedback and submitted traces via the Feedback app. We’ve been reviewing the traces and have identified an issue that we believe is the cause of stuttering in some of the cases that you’ve reported. We have a fix in the Windows Insider build that flighted to the “Fast” ring this week (build 16273 and above). If you are already an Insider please test it with any app or game you’re having this problem with and let us know how it goes.

Microsoft finally confirms game stuttering problems in Windows 10 Creators Update, says fixes are coming | On MSFT