[mercurial]

I don't think anybody is claiming that functional programming makes complexity magically go away. The claim is that functional programming (especially when backed by a strong static type system) makes several categories of issues essentially disappear. That's a much more reasonable claim to make.

[JoeAltmaier]

And a very powerful property. Never mind conserving CPU or memory; the slowest component in any system is the wetware programming the system: you. I always try to use tools and techniques that eliminate the possibility of categories of bugs. I use scope to control use-counting when possible; I use as strong a type as is helpful in the tool I'm using etc.