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Why is LiChess so fast?

I love to play Bullet games, and tried Chess.com and Chess24 but both have a terrible lag which makes a 1+0 min game almost impossible. But on LiChess almost no lag. Why is that?
Maybe it is a sign,it is a sign that best site for you is this xD
#4 I agree with you. Chess.com is just like babbel, you have to pay for the incompetence of the administrators in finding a better way to finance the site.
I wondered about the technical reason:
- better hardware( more faster servers)?
- better software (faster interface)?
- faster internet connection?
- less participants?
- closer to my town?
(all of the above?)
Maybe all of the above?
Better build quality probably has a large say.
After becoming fed up with chess.com more than a year ago I googled "free chess website" and I found this wonderful place. I immediately knew I would be playing chess here forever. Lichess.org has made it possible for me to love chess again.
It's all about the code.

Also for live apps like chess games a NO-SQL database is probably much faster and chess.com and the likes are probably built on old code, old principles and slow yet reliable databases like Oracle or Microsoft.

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