Optimizing Performance (MATLAB Compiler)

MATLAB Compiler

Optimizing Conditionals

(optimize_conditionals) This optimization reduces the MATLAB conditional operators to scalar C conditional operators when both operands are known to be integer scalars. The Compiler "knows" that nargin, nargout, and for-loop control variables (when using the above optimization) are integer scalars. For example:

function test(a,b,c,d)
    if (nargin < 4)
        d = 0.0;
end

If you compile this with the -O none option, you get

...
if (mlfTobool(mclLt(mlfScalar(nargin_), mlfScalar(4)))) {
...

Compiling with -O none -O optimize_conditionals:on gives

```
...
if (nargin_ < 4) {
...
```

Loop Simplification Optimizing MATLAB Arrays