Re: Fast access git-rev-list output: some OS knowledge required

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Hi,

On Wed, 6 Dec 2006, Shawn Pearce wrote:

> Marco Costalba <mcostalba@xxxxxxxxx> wrote:
> > The time it takes to read, without processing, the whole Linux tree
> > with this approach it's almost _double_ of the time it takes 'git
> > rev-list' to write to a file:
> > 
> > 3) Other suggestions?  ;-)
> 
> The revision listing machinery is fairly well isolated behind some 
> pretty clean APIs in Git.  Why not link qgit against libgit.a and just 
> do the revision listing in process?

Because, depending on what you do, the revision machinery is not 
reentrable. For example, if you filter by filename, the history is 
rewritten in-memory to simulate a history where just that filename was 
tracked, and nothing else. These changes are not cleaned up after calling 
the internal revision machinery.

Hth,
Dscho

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