Why are there lags in the canvas game?

Question

Canvas

https://codepen.io/vasilij-shinkorenko/pen/PozVgZw

why does the animation lag? ps. keyboard arrow control

if the game is hard to see, copy the code to a new file on your computer,

Answer 1

1. Because you don't need to draw in the keyboard event!
2. Of course, I don't rummage in JS - but what is this addEventListener for EVERY arrow click? Load everything once and then ONLY change the coordinates