Extreme lagginess in 21w44a

Ya the new snapshot is VEEEEEEEEEEEEEEEEEEEEEEERRRRYYYY laggy.(yes that was Necessary). So laggy it’s unplayable! I can’t put a video in because I don’t know how to do screen recording on a computer. I’m not sure if this is the right place to put this but I didn’t know any other place to put this sooo… ya. Plz fix this.