Speed up website: clean #_social_points_history database table?

Hello. I'm still looking for the way to speed up website.

At the moment there is on site 1 161 938 lines and 131 Mb of #_social_points_history.

What will be happened if I clean it? Users will lose their points history that I can see there for example? https://strana-krovi.com/rating-my/37178-saur-50/points/history

Will be site works faster after it?

Thanks.