Sometimes I get epically slow response from GMail. I’m running GMail in a Chrome tab on a late model Macbook. Sometimes it takes 15 seconds to echo a keystroke or to respond to a mouse click.

• Refreshing the page appears to cure the issue for a while. Then it comes back.
• At the same time as one tab on one GMail account has this latency, another Chrome tab on a different email account works just fine. I’ve observed latency on my @gmail.com account. I’m not sure whether I’ve seen it on my Google Apps email account.
• I tried disabling AdBlock on that page. We’ll see if it helps. I can’t tell without a soak period because disabling AdBlock does a page refresh, and doing a page refresh temporarily cures the problem.