6 Optimizing Performance
6-10
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,andfor 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) {
...
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