The phrase "lightning pace" means moving or working at an extremely fast speed, like the speed of lightning. It is often used to describe something that happens or is completed very quickly.
Babies grow at what seems like lightning pace, but toddlers grow at a much slower rate. (kidshealth.org)
Alexis Sanchez and Mesut Ozil exchanged passes at lightning pace on the edge of the box, before the Chilean slipped in Welbeck with a well - weighted slide rule ball. (thehardtackle.com)
Despite being blessed with lightning pace and a physique to brush off most Premier League defenders, Chamberlain continues to struggle with his final ball and seems to have lost his eye for goal. (justarsenal.com)