CPU_COUNT how many CPUs are available

function N = cpu_count()

  N = maxNumCompThreads;
  if N < 2  % happens on some HPC
    N = feature('NumCores');
  end

% logical CPUs
% https://docs.oracle.com/en/java/javase/22/docs/api/java.base/java/lang/Runtime.html#getRuntime()
% N=java.lang.Runtime.getRuntime().availableProcessors();
end