This is a great write-up with a simple solution - one that I recently realized that I needed.
I put the AddThis button block on some of my article pages at the beginning of May. I was getting less click-throughs to my product page, so I started looking into possible causes. The Site Speed reports in Google Analytics showed that my page load times had increased 2-3x. I profiled some of the slower pages and found that the AddThis external call stack can be pretty deep. After removing them, everything's nice and speedy again, and click-throughs are back up to normal levels.
I put the AddThis button block on some of my article pages at the beginning of May. I was getting less click-throughs to my product page, so I started looking into possible causes. The Site Speed reports in Google Analytics showed that my page load times had increased 2-3x. I profiled some of the slower pages and found that the AddThis external call stack can be pretty deep. After removing them, everything's nice and speedy again, and click-throughs are back up to normal levels.