Andreas Herrmann 79e145a970 gnuplot: Improve startup performance ... Before executing the gnuplot executable the environment variable `GDFONTPATH` is populated with a list of font directories, which is obtained from `fc-list`. In that process we iterated over each line and called `dirname` on it, which introduces a performance hit for loading and executing the external executable `dirname` every time. The new version avoids the loop. The author of this patch measured a 42 fold performance improvement: old version: $ time ./gnuplot_old/bin/gnuplot -e '' real 0m3.828s user 0m0.392s sys 0m0.465s new version: $ time ./gnuplot_new2/bin/gnuplot -e '' real 0m0.091s user 0m0.112s sys 0m0.014s The correctness of the value of `GDFONTPATH` was confirmed with the following command and comparing its output between versions: $ gnuplot -e 'print system("echo $GDFONTPATH")'		2016-01-11 15:37:07 +01:00
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default.nix	gnuplot: use texlive-new	2015-12-12 10:47:03 -06:00
set-gdfontpath-from-fontconfig.sh	gnuplot: Improve startup performance	2016-01-11 15:37:07 +01:00