enabling lz4 compression in zswap (ie, making zswap more efficient)

I've found the solution in this Russian Debian Forum. I had to run these extra steps

sudo su
echo lz4 >> /etc/initramfs-tools/modules
echo lz4_compress >> /etc/initramfs-tools/modules
update-initramfs -u
reboot

And run dmesg | grep -i zswap, to see

[    0.715952] zswap: loaded using pool lz4/zbud

Excited to see how the performance improves.

edit: I have written my steps in this guide. You can check if you face issues enabling zswap.

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