matlab parfor 2018b VS 2022b

m=1209;
n =1000;
imgf = zeros(m,n);
parfor i = 1:m-n
    for j = 1:m-n
        imgf(i,j) = 100;
    end
end
disp(['m-n version',string(imgf(1,1))]);
 
m=1209;
n =1000;
imgf = zeros(m,n);
k1 = m-n;
k2 = m-n;
parfor i = 1:k1
    for j = 1:k2
        imgf(i,j) = 100;
    end
end
disp(['k=m-n version ',string(imgf(1,1))]);

上述代码中，parfor是使用CPU并行计算实现程序计算

在matlab2018b中

在matlab 2022b中，如下