An upcoming patch for the Xbox One edition of The Witcher 3: Wild Hunt will lock the game at 30fps. That's according to CD Projekt Red community lead Marcin Momot, who offered the following statement.
@stay_scialla The lock should be there in the upcoming patch.— Marcin Momot (@Marcin360) May 26, 2015
A Digital Foundry tech analysis published last week found that the Xbox One edition could, at times, achieve a resolution higher than 30fps. That might sound nice, but the frame rate was also found to be quite unstable. Sometimes it dipped below 30fps, leading to an undesirable stuttery experience.
The Xbox One patch is currently going through Microsoft's certification process, which means, barring any problems, it should be released soon. A PlayStation 4 patch, which also promises to improve performance, was released earlier today.