Data Copy Reduction
Reduce RAM and ROM consumption and increase code execution speed by eliminating data copies in the generated code. The code generator eliminates some data copies. You can eliminate other data copies by adjusting certain model parameter settings, specifying the same name for the input and output arguments of MATLAB Function blocks, and by using Simulink signals to specify reuses.
Model Settings
| Inline invariant signals | Transform symbolic names of Invariant signals in generated code |
| Eliminate superfluous local variables (Expression folding) | Specify to fold expressions into single expression |
| Function inlining between user functions | Control inlining for calls from user-written functions to other user-written functions (Since R2025a) |
| Function inlining between MathWorks functions | Control inlining for calls from MathWorks functions to other MathWorks functions (Since R2025a) |
| Function inlining between user and MathWorks functions | Control inlining for calls from user-written functions to MathWorks functions and from MathWorks functions to user-written functions (Since R2025a) |
Topics
- Fold Expressions
Expression fold code to minimize the computation of intermediate results at block outputs and the storage of such results in temporary buffers or variables.
- Enable and Reuse Local Block Outputs in Generated Code
Where possible, the code generator declares block outputs as local variables, so that it can potentially reuse these variables.
- Generate Efficient Code for Buses
Model buses to maximize efficiency of the generated code.
- Use memcpy Function to Optimize Generated Code for Vector Assignments
The code generator optimizes the generated code for vector assignments by replacing
forloops withmemcpyfunction calls. - Control Inlining to Fine-Tune Performance and Readability of Generated Code
Inlining eliminates the overhead of function calls but can produce larger C/C++ code and reduce code readability.
