# Pastebin 5akge47B
# manveru @ kappa in ~/github/haskell-nix/hnix on git:master o [2:09:26] 
$ time nix-instantiate --parse ~/github/nixos/nixpkgs/pkgs/development/haskell-modules/hackage-packages.nix  > /dev/null 
nix-instantiate --parse  > /dev/null  0.51s user 0.04s system 99% cpu 0.556 total

# manveru @ kappa in ~/github/haskell-nix/hnix on git:master o [2:09:29] 
$ time ./dist/build/hnix/hnix ~/github/nixos/nixpkgs/pkgs/development/haskell-modules/hackage-packages.nix > /dev/null
./dist/build/hnix/hnix  > /dev/null  6.76s user 0.30s system 99% cpu 7.102 total