I recently installed the +1 button on my website.. but it made it slower. way slower. it loads the page twice for some reason. Deleted it now. My advice: don't use it if you don't want a slow loading website.
Doesn't slow down my website. Maybe you did something wrong or there's something interfering with the button?
Don't know what could be causing that honestly. I would imagine it had something to do with your implementation though because a bug that large would have been noticed by now on other sites.
Thats very strange. I have the button on my website and it hasn't slowed at all. What platform are you using? I placed it on my Joomla! site and it had no slow effect.
Hello it does not slow down any of my site, maybe you have a conflict somewhere try this and learn more on what is going on http://www.webpagetest.org/
I have seen it on a number of websites, and I don't see any difference on the loading of the pages websites.