Fastest/Lightest server/channel combination for same host Delphi/C# communication

[antonk]

Hello

@obones

But every time a C# client makes a call to the Delphi server, the server creates a thread, processes the request and lets the thread die.

This behavior is not tied to a concrete server channel type. Iow any request will be processed in that way, regardless of the server channel used to receive it. Also some time is required to deserialize the incoming message to acquire service name and its method name, parameters and so on.
If you’ll decide to try out Hydra than take a look at this post, it will help you to create a Delphi host and .NET plugin: Need a Jumpstart with Delphi XE3 and .NET 2.0 DLL Assemblies Integration - #3 by antonk

Regards