I think more people should know about the existence of ZRAM on modern Linux distributions. It's really changed the way I look at swap configs.

ZRAM is a compressed block device that is stored in RAM. It's great!

Previously, if I ever had high memory pressure situations, I really dreaded the slowdowns. Now, with swap sitting on top of /dev/zram0 it's a completely different experience.

I have ZRAM enabled on all of my personal machines, both laptops with limited memory, and desktops with 64 or 128GB of RAM. It's rarely used, but it is nice to have that extra room sometimes.

The performance of a zram device is so much faster than even the latest NVMe drives.