Hopelessly haphazard
zRAM is a kernel module which creates swapspace in compressed RAM. The speed benefits of having swapspace in RAM far outweigh the minor cost of compression in CPU cycles.
zRAM is controlled by systemd, there’s no need for an fstab entry. It’s also installed by default on RHEL 7 and 8 and their clones. All you need to do is enable it. There are several steps to this process.