On Tue, Aug 28, 2007 at 02:11:18AM -0400, Shawn O. Pearce wrote:
> Another place where fast-import can be a big win over git-add is
> importing a huge number of loose objects and then doing a `repack
> -a -d -f`. Even though the fast-import packfile is suboptimal we
> can usually get to the data in the packfile faster than we can get
> to it from loose object files. So adding in the repack time might
> show fast-import is slightly faster in some coditions.
Just for giggles, here's the timing of the "core" and "perl" versions,
both with a "git repack -a -d -f" afterwards.
core:
real 0m3.353s
user 0m2.108s
sys 0m0.580s
perl:
real 0m3.138s
user 0m2.704s
sys 0m0.236s
So the perl version actually wins here, though with two caveats:
- the core version spends more sys time. Presumably this is because it
actually gives you a working index, whereas the fast-import version
does not.
- the perl version actually consumes _more_ CPU time, but finishes
more quickly. Yes, this is an SMP box. :)
-Peff
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