RE: Observation on Hadrian's relative performance re current buildsystem

Simon Peyton Jones via ghc-devs writes:

Urk! I expected Hadrian to be faster because it has more accurate dependencies.

While this is just speculation, this might actually be one of the reasons why the no-op case is slower: in make's case the dependency graph is mostly static whereas in Hadrian the build system needs to discover dependencies dynamically. Either way, thanks for this characterization, Herbert! Cheers, - Ben