I’ve been trying to figure out the sudden speed decreases on a couple of client sites and finally realized that it was the result of Rocket Loader. I see now that there has been some type of update to it. I see it adds an ID tag to the scripts and then begins to load them one at a time VERY slowly where as before there would be 2-3 requests concatenating the js files.
Now once Rocket Loader begins processing JS files and downloading them, it takes an additional 2-4 seconds which slows the entire loading process of the page down.
One site went from an average load time of about 1 second fully loaded, to now almost 3 seconds with it active. If I turn Rocket Loader Off…it’s back down to 1.2 seconds.
Another site that used to load in about 1.4 seconds is at upwards of 4-5 seconds with it active.
Whatever was done has destroyed the benefit of Rocket Loader for every site I’ve tested it on that has the updated system.