Calling fortran executable file from matlab is much slower

I have a fortran code compiled into a exe file. I can run it directly through the command line, or simply call the executable from matlab. This two approaches lead to massively different execution speeds and I am unsure why.

If I run the executable file from the command line, the first part of the code runs in **1,000** seconds with all cores/threads of my computer being used:

If instead I call the fortran executable from matlab it does not use all cores/threads and takes approximately **1,400** seconds to run.

I am calling the code using: `system('path\LoopFortranToMatlab.exe')`