Re: Slow start-up on Git trees

[Dan Nicolaescu <dann@ics.uci.edu>]

Joakim Tjernlund <joakim.tjernlund@transmode.se> writes:

  > Dan Nicolaescu <dann@ics.uci.edu> wrote on 19/08/2009 22:56:00:
  > >
  > > Christian Faulhammer <fauli@gentoo.org> writes:
  > >
  > >   > Hi,
  > >   >
  > >   > Joakim Tjernlund reported in
  > >   > http://bugs.gentoo.org/show_bug.cgi?id=281009 that Emacs started in a
  > >   > Git tree is really slow.  This does not happen with other SCM systems
  > >   > and we were able to reproduce the problem and narrowing it down
  > >   > to /usr/bin/git diff-index -z HEAD -- Makefile, called in
  > >   > vc-git-state.  Any possibilities to improve performance here?
  > >
  > > There are at lease two ways:
  > > - talk the git people to improve the performance of "git diff-index",
  > > - implement a vc-git-state-heuristic (see other vc-*-state-heuristic
  > >   functions) that parses .git/index and uses that return the state of
  > >   the file, thus avoiding the "git diff-index" call.
  > >
  > > Is worth it?
  > > I'd say probably not, the delay only happens the first time of accessing
  > > a file in the git tree.
  > 
  > The first time every day is a bit annoying. How about, for a starter, a simple
  > way of disabling vc-git in ~/.emacs?

 (setq  vc-handled-backends                (delq 'Git vc-handled-backends))