Simulation Mode Tradeoffs

In general, you must trade off simulation speed against flexibility when choosing either Accelerator mode or Rapid Accelerator mode instead of Normal mode.

Normal mode offers the greatest flexibility for making model adjustments and displaying results, but it runs the slowest.

Accelerator mode lies between Normal and Rapid Accelerator modes in performance and in interaction with your model. If your model has 3-D signals, use Normal or Accelerator mode. Accelerator mode does not support runtime diagnostics.

Rapid Accelerator mode runs the fastest, but this mode does not support the debugger or profiler, and works only with those models for which C code is available for all of the blocks in the model. In addition, Rapid Accelerator mode does not support 3-D parameters and sinks.

for i=1:100 sim(model); % executes in less than one second in Normal mode end

Comparing Modes

The following table compares the characteristics of Normal mode, Accelerator mode, and Rapid Accelerator mode.

If you want to...	Then use this mode...
	Normal	Accelerator	Rapid Accelerator
Performance
Run your model in a separate address space
Efficiently run batch and Monte Carlo simulations
Model Adjustment
Change model parameters such as solver, stop time without rebuilding
Change block tunable parameters such as gain
For more information on configuration set parameters which can be modified without requiring rebuild, seeCode Regeneration in Accelerated Models
Model Requirement
Accelerate your model even if C code is not used for all blocks
Support Interpreted MATLAB Function blocks
Support Non-Inlined MATLAB language or Fortran S-Functions
Permit algebraic loops in your model
Have your model work with the debugger or profiler
Have your model include C++ code
Data Display
Use scopes and signal viewers			SeeBehavior of Scopes and Viewers with Rapid Accelerator Mode
Use scopes and signal viewers when running your model from the command line

Decision Tree

Use this decision tree to select between Normal, Accelerator, or Rapid Accelerator modes.

SeeComparing Performanceto understand how effective the accelerator modes will be in improving the performance of your model.