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MAT files saved much larger then expected

From: Mark popov
Subject: MAT files saved much larger then expected
Date: Thu, 13 Apr 2017 01:05:51 -0700 (PDT)


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

Thanks in advance,

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