GNOME session is slow to suspend
When I started using Gnome on my new laptop, I noticed that putting the machine to suspend (whether by triggering the "suspend" action in the dashboard or by just closing the lid) took much longer than I was used to from previous machines -- but I figured this would be a problem with the drivers or so. However, I have just tried KDE on this machine, and it suspends much faster. So it seems like somehow GNOME is doing something different from KDE and that leads to suspend being mucher slower (around 10s with GNOME vs. around 2s with KDE).
This is on Debian testing, with a Lenovo ThinkPad P50. Kernel version is 4.19.37 (but I've seen the slow suspend with the older version numbers I used over the last year as well).