Re: [RFC] Add posibility to preload stat information.

[Fredrik Gustafsson <iveqy@iveqy.com>]

On Wed, Mar 20, 2013 at 11:19:38PM +0530, Ramkumar Ramachandra wrote:
> I think it should be a separate script in contrib/ that people can
> just `eval` in their shell configs; zsh has a chpwd() function for
> example, which seems like the right place to put such a thing.

I was trying to spare the number of calls to "git rev-parse
--is-inside-work-tree". But maybe that is to fast to care about.

> No, I meant in the commit message.

Okay, thanks.

> >> That said, this feature is extremely gross; it thrashes my filesystem
> >> and hard drive.  Modern software is written to minimize IO, not
> >> maximize it!  I'm completely against the inclusion of this patch.
> >
> > It's extremly gross. I don't like this, _but_ it does speed up my work.
> > I'm unsure if it should be included in git though (hence the RFC-tag).
> 
> Yes, I would certainly like my git startup time to be improved.  But I
> don't want to trade my hard drive's life for it.

Does this really increase disk-reads? The fs-cache would make sure that
the disk reads is almost the same, we only do them before we usually do
them.

> What I meant by "first time" is "chpwd() into the git repository, not
> further chpwd()s when already inside the git repository".

That's a good point. I'm not sure how to solve that though. Because it's
not a fact that you always go to the root git-dir first.

The only way I see this is with a lock-file that's kept and we only run
git status every 5 minutes when doing something inside a work dir. That
would add a lot of meta-data (the lock files), to store. (I hope I
successfully explained that).

-- 
Med vänliga hälsningar
Fredrik Gustafsson

tel: 0733-608274
e-post: iveqy@iveqy.com