Based on a number of reports, it has become pretty clear that the Like buttons and other Facebook social plugins have been slowing down many of the sites that use their product.

For months now it has been a well known fact among the developer community that Facebook’s plugins can frequently run into loading problems. While Facebook is well aware of the issue, and most definitely working on resolving it, that doesn’t stop the fact that the page load can be extremely slow. One large publisher, who wanted to remain unnamed, sent us the chart below which highlights the peak loading time for the like button sometimes.

Like Load Time Screenshot

While most sites aim to have their site completely loaded within a fraction of a second, it appears as though the load time can drag on dramatically, and in the case of the publisher that reached out to us, Facebook can drive the sites to take up to 6 seconds to load. Ultimately, any external widgets you use can slow down a site, however it’s well known that Facebook can be one of the primary forces behind that. Now we have some numbers to show that’s the case.

Have you had the like button slow down your site at all?