Scalable Delphi TCP server implementation

Question

Any suggestions for components to use as a base for a scalable TCP server? I currently have an implementation that uses Indy which works well for say 100 relatively active c

Answer 1

I've tried multiple Delphi solutions to do networking, and found that many if not all solutions add complexity and code which impacts on either performance or footprint or both. So I started searching for the lightest wrapper around the winsock API. The I (re)discovered Delphi's own TTcpClient and TTcpServer components. Used in blocking mode, and overriding TCustomTcpServer overriding the DoAccept method, I've had the best results till now.

If you expect to have a really high number of incoming connections and (small) responses to serve to (small) requests, it's highly advisable to implement I/O completion ports, as this handles incoming requests better.