Why Real-time model data structure in MATLAB2018b version?

I have compared the c code generated from MATLAB 2010b as well as MATLAB 2018b (in both the versions all the simulink parameter were same), and I found that in the latest version real time model data stucture is generted. Why it is not there in MATLAB 2010b, but its's there in MATLAB 2018b?

Answer 1

[Andrey Kiselnikov]

Because both C/C++ coder and HDL coder continuously developing to perform better characteristics and looking of generated code.

[Asang singh]

Thanks for your response Andrey.

I still have one doubt, because of this structure, my step and initialize function's arguments got changed (again compared to 2010b verison), i.e. RT_MODEL is one of the argument which got generated, so is it ok to proceed with this or will it have any effect w.r.t memory or run time.

[Andrey Kiselnikov]

The MathWorks provides special training where they explain the code generation strategy and how to build a good model for generating the code.