The problem isn't doing work on a website, its if you have an idle task that is taking up a significant portion of the frame budget then its easy to have frame drops when you do significant work like clicking, scrolling, browsing.
Idle work showing up in flamecharts is usually the thing to be cautious of.
Zoom in, take a look at what code is running, and you'll see it's all `lottie_light.min.js`. Being offscreen doesn't mean it's doing nothing. In fact, it looks like once it shows once it keeps spinning its RAF loop forever. Shrink your window so it disappears, reload, and then profile.
? In this very particular case, yeah, the original commenter was holding it wrong, as they inspected the wrong thing. People sometimes hold things wrong and it's okay.
Cursor idle, viewport on the button examples. 3ms repaint every 8-11ms. Animation frame points to the code i mentioned.
https://postimg.cc/sQpZxxzv
The problem isn't doing work on a website, its if you have an idle task that is taking up a significant portion of the frame budget then its easy to have frame drops when you do significant work like clicking, scrolling, browsing.
Idle work showing up in flamecharts is usually the thing to be cautious of.