And the fastest starting desktop environment is …

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No, not really. But it’s quite close (and it actually also depends on how you twist the benchmark. When my desktop machine could start KDE in less than 4 seconds I was curious what would the situation be with this slow laptop, the one which started KDE in 5-6 seconds at aKademy. But that was with almost no fonts installed, no XIM, no wallpaper, the simplest splash and other tricks from the KDE performance tips page. Well, now it can do it in the same time even without that. It leaves GNOME few seconds behind and gets very close to Xfce startup time.

Link: KDEdevelopers.org