Is it possible to make HexGadgets issue multiple queries in parallel to save time?
Yes and no. The current HexGadgets only operate synchronously. In other words, the executing thread cannot continue until a method call has returned. Thus, HexGadgets will only be able to do one thing at a time in a single thread (such as that of an ASP request). If your programming system allows multiple threads, however, you can simultaneously run a HexGadget operation in each thread.