The main problems are:
- adding rows to tables via appendChild is slow if there is markup in any cell. (My rows have only 3-8 cells)
- the same markup seems to increase the "lag" time to display, increasing further the apparent time to sort.

Some info:
I am trying to sort tables that may have thousands of rows. My sort works fine (acceptable) for < 500 rows. The actual speed (from click to sort,...