Hi Martin,
> I'm creating a small document with
>
> \documentclass[a4paper]{article}
> \usepackage{luatextra}
> \defaultfontfeatures{Ligatures=TeX}
> \usepackage{unicode-math}
> \setmathfont{Latin Modern Math}
> \usepackage{libertineotf}
>
> The startup-time of libertineotf is quite noticeable;
> the machine "stops" for some seconds to load all the
> cached font info (and this on a quite fast machine).
>
> Is there a way to reduce the startup time of using
> libertine?
I am aware of the problem and there is no way I know to reduce the load time.
I've opened a ticket...
https://github.com/pgundlach/linuxlibertine/issues/1
Patrick