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by als0 2446 days ago
I had the same impression. That general feeling that the screensaver is like an app/overlay that is invoked only once the desktop is active. The speed of invocation also seemed related to how fast your machine is at launching general desktop programs...
1 comments

>That general feeling that the screensaver is like an app/overlay that is invoked only once the desktop is active

That is how it is implemented (in X11)