Re: [PATCH] Add pack.depth option to git-pack-objects and change default depth to 50

[Nicolas Pitre <nico@cam.org>]

On Tue, 8 May 2007, Theodore Tso wrote:

> After all, if we just stop and think about how the delta caching
> works, and how the repacking algorithm works, it's pretty clear that
> there shouldn't be any scaling issues with increasing --depth, and
> that increasing --window is just going to be painful, and these should
> hold true regardless of the size of the repo.

The window size has absolutely no effect on the runtime pack access, 
except maybe for the increased number of deltas.  It is really a pack 
time cost.  The delta depth is the opposite: it has no effect on the 
packing time, but it has the potential to slow down runtime access.  But 
the delta base cache is apparently working really well to mitigate that 
cost, as long as it is big enough of course.


Nicolas