Largefiles slow with ignored files?

[Michał Sznajder]

I have a repo with a few tracked files and tons of ignored. It
has largefiles enabled (by accident though).

  $ hg showconfig | grep large
  extensions.largefiles=
  $ hg status --all | wc -l
    127356
  $ hg status --ignored | wc -l
    127123

While working with it I found that status is much faster without
largefiles:

  $ time hg status > /dev/null

  real	0m10.931s
  user 0m4.783s
  sys	0m4.966s

  $ time hg status --config extensions.largefiles=! > /dev/null

  real 0m0.163s
  user 0m0.114s
  sys	0m0.042s

I am aware of http://mercurial.selenic.com/bts/issue3136 but I think
I already have it:

  $ hg --version --quiet
  Mercurial Distributed SCM (version 2.1.1+50-72597eb0204f)

I checked the code and I think it has something to do with a comment here
http://selenic.com/repo/hg/file/329887a7074c/hgext/largefiles/reposetup.py#l158
Why ignored files are so special that we always request for them?
They are only used in line 242 to calculate unknown files.

Michał Sznajder