[jesse__]

I think reducing this to "using mmap is basic" is pretty unfair.

The trick she did overriding malloc & friends to validate that the optimization would be worth doing is, in my mind, one of the high-points of the paper. It's a very clever way of making a meaningful measurement, which was the keystone of the entire change.

I've never heard of, thought of, or used that trick, and the fact she had it in her arsenal to apply to this very specific situation is pretty impressive, to me at least.