MAT files saved much larger then expected

[Mark popov]

Hi,

I'm accustomed to Matlab, using it for around 12 years, and now started
using Octave as well.

I've noticed something strange - saving .mat files, might result with much
higher size than expected. 
For example, saving a .mat file which contains a single struct of ~380
cells, each one's size of ~1MB, results with an overall file size of 1GB
(instead of just 380MB).
The size of the RAM memory actually seems OK, only when writing to the
hard-drive its size explodes.
Furthermore, loading it takes considerable amount of time, and it's much
more efficient to load the same data from distributed 400 different mat
files.

Thanks in advance,
Mark



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