@p @lain @graf @mint @Moon Pleroma is I/O bound partially because it was written in a language specifically designed to be incredibly slow and wasteful when it comes to reuse of memory.

It cannot be repeated enough. Functional programming languages are totally orthogonal to how computers actually work and you can never take advantage of the properties of a computer if you view how a computer actually operates as a flaw that requires a rube goldberg machine to pretend doesn't exist. But of course, never will cease to exist because ultimately you are trying to get a computer to do a thing, not just turn on and get warm (as the intended purpose of functional programming languages).