Re: [patch/rfc] grafthistory: keep the downloaded pack, speed up git gc

Kalle Olavi Niemitalo <[email protected]> wrote Sun, Feb 24, 2008:
> To segregate the historical commits (can't remember why),
> I originally placed their pack in an alternate object store,
> but later I found that a *.keep file does the job as well.
> This gives a considerable speedup in git gc.  It takes some
> more disk space but OTOH you might then run gc more often
> and have fewer loose objects.
> 
> OK to push?

Yes, please. It sounds like a very good idea.

> +# real      user      sys      (tested in this order)
> +# 1m15.900s 0m59.732s 0m4.336s gc after clone&graft without *.keep
> +# 0m23.162s 0m17.549s 0m1.588s gc after clone&graft with *.keep
> +# 0m06.932s 0m04.440s 0m0.588s gc after clone&graft&gc with *.keep
> +# 0m32.214s 0m24.138s 0m2.284s gc after clone&graft&gc without *.keep
> +# Total size of .git/objects/pack/ was 90592 KiB without *.keep
> +# and 97397 KiB with *.keep.  So *.keep reduced gc time by 70-80%
> +# but increased disk space usage by 7.5%. 

Maybe without this?

-- 
Jonas Fonseca