Comment 1 for bug 418726

Does any other app (like word, excel, illustrator, etc.) take as much time? Aside from what this test might tell us, a total of 5700 fonts is way past the limit of what is advisable. It will slow down any application that needs fonts, specially those that show a menu or list with them, and there is no real advantage on installing them since you're not going to use them all the time anyway. It's better to install a font manager and activate selectively fonts that you are going to use at that moment.

My impression is that this is a problem with the massive number of fonts. Is a problem on the operating system, not due to Inkscape.