Re: are diffs available for .orig.tar.gz files

["Tshepang Lekhonkhobe" <tshepang@gmail.com>]

On 2/20/07, Kevin Mark <kevin.mark@verizon.net> wrote:
> On Tue, Feb 20, 2007 at 07:54:34AM +0200, Tshepang Lekhonkhobe wrote:
> > IIUC, you mean you want to know the benefits of doing diff files, as
> > compared to doing binary ones? If you got massive bandwidth, binary's
> > cool, but if you want all 3 DVD's (loads of us don't have internet
> > connection), you quickly notice the use of compiling from source via
> > diffs.
> What I meant was:
> get upstream tarball (A minutes,B MB)
> make to compile (C minutes, D MB)
> make install (E minutes, E MB)
> then
> get diff (F minutes, G MB)
> make to compile (H minutes, I compile)
> make install (J minutes, K MB)
> Time T0=A+C+E
> Time T1=F+H+J
> then compare
> apt-get (L minutes download, M minutes install, N Minutes install)
> Time T2=L+M
>
> initiall install:
> is T0 < T2

nope. Initial compilation for source will be punishing, depending on size.

> first upgrade:
> is T1 < T2

I suppose so, since make will only compile changed files, though I
don't know the Debian tools dealing with these since the Debian way
ought to make my life easier.

> is T0+T1 < T2 * 2

If you have dial-up, probably yes, considering that one doesn't
recompile the entire thing from scratch, and also CPU power of course.