Comparative study is one of the best ways to benchmark, compare and conclude right option for the right job. I came across an interesting comparative study of size of data that gets created by results returned thru TDS compared to size of data that gets created by FOR XML AUTO option for the same piece of data.
Even to my surprise, there is a huge difference between the two options when this size of data is to be accessed over the network. So when you expect huge resultsets to be returned, you might want to think twice by looking at the results in the below image (Image courtesy: SQLServerPedia.com). It's not that XML option is not good, it has it's own place and set of requirements that it caters. But while designing your architecture, this piece of comparative study is worth considering and it can also prove helpful to carry out a Proof-Of-Concept ( POC ) before considering this option in your low-level designs.
Original article can be read from here.
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