saving small data in '-v7.3' format

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Mech Princess 2014-5-5

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/128370-saving-small-data-in-v7-3-format

编辑： Mech Princess 2014-5-5

I am trying to figure out how '-v7.3' changes the saving method. I read in the help that it compresses files larger than 2GB. Is this bcoz default memory allocation is 2GB?

Is it unwise to use '-v7.3' to save small data? For example see below.

%code 1: file size of  "data.mat" from code 1 is ~1kB
A = [1:100];
B = {1:10};
save(['data.mat']);
%code 2: file size of  "data.mat" from code 1 is ~5kB
A = [1:100];
B = {1:10};
save(['data.mat'], '-v7.3');