foxisapi and the asp.net isapi or asp isapi are pretty much the same. Some might argue that there's overhead in carrying around all the objects of Asp/asp.net, but, I would argue that any performance tweaks will go into the asp.net isapi since it's the flagship product(and probably none to foxisapi!). I don't see how you can get better in the fox web world than a dll isapi client(be it asp,asp.net,or foxisapi) talking to a vfp mtdll server as far as performance. In general, any kind of dll is preferable to a standard exe in MT environments for both clients and servers.