Did you tried to investigated it by your own? I think you could use the JavaScript Debugger tools from some browsers. Please don’t forget to share your results with us :)
Hi,
as always this depends on what you’re showing in your list.
Retrieving associated data is usually more efficient in datagrids as these are retrieved together with the main objects in a single query. There has been some optimization w.r.t. listview performance and such kind of retrieves.
After all you should follow the advice by Gerrit and just check how many queries are generated.
regards, Fabian