[tex-live] Manually unloading fonts preventing running out of memory

Philip Taylor (Webmaster, Ret'd) P.Taylor at Rhul.Ac.Uk
Mon Oct 11 12:06:27 CEST 2010

Pander wrote:

> Will Robertson, the author from fontspec, proposed the following for me to
> test:
> [[ begin quote ]]
> Use a plain XeTeX document without fontspec and load lots of fonts with
> commands like this:
> \def\testfont#1#2{%
>    \font#1="#2" at 12pt#1 A test of the font "#2"\par
> }
> \testfont\aaa{Palatino Linotype}
> \testfont\bbb{Georgia}
> You should see an increase in the memory numbers reported at the end of
> the XeTeX run (in the log file if not on the console) the more fonts you
> add.
> If you then write
> \let\aaa\relax
> \let\bbb\relax
> ...
> the fonts may or may not be unloaded and the memory results will change.
> You could also experiment with putting the font loading calls inside
> groups and see if that changes things as well.

It is too long since I looked inside TeX to be sure of this,
but it /may/ be that you will need to unload the fonts in
the reverse order that in which they were loaded in order
to regain all of the space allocated.

Philip Taylor

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