Hi Kris
when you look at the fetch time, you of course should get more or less the same timing whenever you fetch the same amount of data.
It's the time required to move data from the server to your client. So unless the network connection speed really varies a lot this number should be somewhat stable.
However, I recommend to check the server processing time in the "statement executed" line. That usually provides a much better feeling on relative performance differences.
- Lars