https://www.polygon.com/2018/12/14/18140814/super-smash-bros-ultimate-input-lag-latency-feel

Super Smash Bros. Ultimate is the most comprehensive and arguably the best-looking entry in the Super Smash Bros. series, but it can’t compete when it comes to input lag. According to detailed analysis from Gigaboots, which has analyzed input lag in a number of games and is quoted extensively in the game’s Digital Foundry breakdown, Super Smash Bros. Ultimate is the least responsive game in the series.

The group filmed themselves hitting a button at 1,200 frames per second, measured the amount of time before the character reacted on-screen and then subtracted the input lag of the display. This was done 30 times for every setup, and the results are charted according to the highest, lowest and average amounts of input lag.