[pan69]

I think that overhead would be negligible, especially if the other examples are all based on micro-frameworks (i.e. loads of files).

Premature optimisation is the root of all evil, right?

[cheald]

Disk IO is a massive problem at scale. This obviously isn't "at scale", so it works fine here, but avoiding hitting the disk (edit: any slow IO, really) is Performance 101.