about lichess analyser

What do you mean by that

Is it laggy?

That's completely normal. What you are experiencing is your cpu (If you're doing it local) or lichess servers computing. Computing takes time. Always. Chess is a complicated game with an unimaginable amount of possible variations. Taking all of them into account (given a certain starting point) with enough depth takes time.

Ugly deleted comments everywhere! here supposed to be a forum not a messenger app.

do u think u are a world class player?

Yes i am a world chess player

Of course your not!