At the first glance, the TuneText increases size of original content.
In particularly, it adds some JavaScript code, - minimum 35K.
However, the most amazing thing is:
The overall size of
the resulting TuneText pack is usually smaller(!)
than sum of its original content files!
This is because TuneText Builder additionally applies a special optimization
to HTML files. In particular, it removes unused comments, spaces,
line breaks, etc.
This alone allows decreasing size of content files from 5 to 50%.
And the more files are used, the bigger is the difference in bytes!