On 12/11/2014 21:33, Herbert Schulz wrote: > \setmainfont{Gentium Book Light}[Ligatures=TeX] > although there is backward compatibility. No slow down then. Confirmed: \setmainfont{Gentium Basic}[Ligatures=TeX] % Fast \setmainfont{Gentium:Ligatures=TeX} % Fast \setmainfont{Gentium Basic:Ligatures=TeX} % Slow