In my testing, zram has much, much better compression than zswap.

The points about LRU inversion, cgroups, and so on are valid, but at the end of the day, I don’t really care. I was able to open as many firefox tabs as I wanted with zram, but I could not do so with zswap, and that’s what matters to me.

The author of a blogpost is a facebook engineer. Millions of ultra high performance Linux servers are a very different usecase than a single desktop. It’s perfectly reasonable for a solution for one to not be appropriate for the other.