https://support.chess.com/customer/en/portal/articles/1444918-my-internet-connection-is-fine---why-am-i-getting-disconnects-
That is about disconnects but most of the suggestions can help with lag too. Also, disabling Flash for the site may help.
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Why is there so much lag on this site. It is not my machine, it appears from what I can tell
it is the ads that hold up my clicking on share and then forum, yes, I could get a pay membership, it still seems, (to me), that is improperly implemented ads. Does anyone else with the free membership on v3 have problems such as this.