Thanks for your suggestion. So I've tested on a Xubuntu 16.04 installation on VirtualBox, and it takes 3-4 seconds to boot LibreOffice Writer. It has something

Thanks for your suggestion. So I've tested on a Xubuntu 16.04 installation on VirtualBox, and it takes 3-4 seconds to boot LibreOffice Writer. It has something to do with macOS X...