It seems that many of the products Google actively encourage web authors to add to their sites are paradoxically the ones that have the worst impact on performance.

The amount of data they collect goes far beyond what is useful to the end user, and is undoubtedly a contributor to the huge proportion of “junk data” stored in datacentres worldwide.

I recently made the case for this at work while making improvements to the company website, and my manager admitted that they rarely look at the analytics.