[mscdex]

It's only an alternative if you have a backing swap device. zram does not have this requirement, so (aside from using no compression) it's basically the only solution for some scenarios (e.g. using entire disk(s) for ZFS).

[kragen]

Can't you use a ramdisk as your backing swap device?

[PhageGenerator]

Using a ramdisk for zswap is basically just zram with extra steps.

[Ferret7446]

It is not the same at all. The swapping algorithm can make a big difference in performance, for better or worse depending on workload

[RealStickman_]

Zram is just swap but in RAM. It uses the same algorithms as normal swap

[kragen]

Extra steps are fine if the result works better.