query performance in .Net

[StevenPrice1964]

Hi
We are using Force.com from C# but some of our queries that return a large set of data are now taking a long time. We compared the speed using QueryAsync (62 seconds) with doing the same query in Salesforce workbench (8 seconds) . I assume that the difference may be the overhead of the JSON format and unpacking on the client side in the reply data but we are not sure.

Can anyone advise on how we could improve the performance using force.com, I see some mentions of compression but am not sure if that applies to our situation and how to implement it

Many thanks for your help in advance

Steve