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Re: [OT] Zip file browsing tool

On Sun, Mar 02, 2008 at 08:55:36PM -0600, Ron Johnson wrote:
> > iso files aren't compressed.  When downloading a new OS CD, I wish they
> > were gzipped; would save a bunch of telephone time.  
> I wonder how compressible they are.
Well, I suppose it depends on what's on it.

I just tried an older version of OpenBSD iso, but its mostly compressed
tarballs already. 

Here's the results of that:

total 420M
-rw------- 1 dtutty    dtutty    419M Sep  9 12:50 obsd.iso.gz
-rw------- 1 dtutty    dtutty     129 Mar  3 12:32 time.txt

34.97user 1.30system 0:36.88elapsed 98%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+241minor)pagefaults 0swaps

That's the output of time to the command:
/usr/bin/time -o time.txt gzip -v -9 obsd.iso

It reduced it by 7.3% in looks like 36 seconds.  This is on my Athlon64
3800+ with 1 GB ram stick, running Etch amd64.

It took 14 seconds to gunzip.

So if debian cd's are also mostly tarballs (debs), perhaps it wouldn't
save much.


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