GNU logs - #8288, boring messages


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find-file and save-buffer are slow.  It appears to be due to vc-git-state.

vc-git-state calls:

     git diff-index -z HEAD -- file.cpp

Which is slow on large git repository, such as webkit.

The question is then whether or not vc-git.el can be more clever than it is now.

I don't have the answer to this.


System:
ubuntu 10.04 64bit
emacs 23.2
git 1.7.0.4
8G of ram
Intel Core i7 (8 processors)






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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: S Boucher <stbya@HIDDEN>
Subject: bug#8288: Acknowledgement (vc-git slow on large repository)
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Date: Fri, 18 Mar 2011 19:33:02 +0000

Thank you for filing a new bug report with GNU.

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8288: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D8288
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I think 'git diff-index -z HEAD -- <file>' could be replaced with 'git status -z 
--porcelain <file>' in vc-git-state.

It is 10times faster on a large webkit repository.




----- Original Message ----
> From: GNU bug Tracking System <help-debbugs@HIDDEN>
> To: S Boucher <stbya@HIDDEN>
> Sent: Fri, March 18, 2011 3:33:02 PM
> Subject: bug#8288: Acknowledgement (vc-git slow on large repository)
> 
> Thank you for filing a new bug report with GNU.
> 
> This is an automatically  generated reply to let you know your message
> has been received.
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> -- 
> 8288: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=8288
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> 






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S Boucher <stbya@HIDDEN> writes:

> I think 'git diff-index -z HEAD -- <file>' could be replaced with 'git status -z 
> --porcelain <file>' in vc-git-state.

This requires at least git 1.7.0, but it can be replaced by --short in
older versions.

Andreas.

-- 
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This issue has been very frustrating for me with GCC git; when the 
repository isn't in the cache saving a file can cause emacs to freeze 
for about 10 seconds.  I work around it with

(defun vc-git-state-heuristic (file)
   "Just claim we're up to date."
   'up-to-date)





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