Archiver with highest compression ratio

  • Thread starter Thread starter Jorge Alvarez
  • Start date Start date
Jorge Alvarez wrote in said:
Browsing the list of most downloaded software from sourceforge.net, I
stumbled across 7-zip and liked it a lot. It's freeware and open source:
Click to expand...

Yes a nice one. Don't know about highest compression ratio, but I do
know that quite a few in this group like it. Else it would not have
ended up on the Pricelessware list.
Have a look: <http://www.pricelessware.org/>.
7-zip listed here:
<http://www.pricelessware.org/2004/PL2004FILEUTILITIES.htm#Archives:Zip-Unzip>

All the best,
Bjorn Simonsen
 
Bjorn said:
Yes a nice one. Don't know about highest compression ratio, but I do
know that quite a few in this group like it. Else it would not have
ended up on the Pricelessware list.
Have a look: <http://www.pricelessware.org/>.
7-zip listed here:
<http://www.pricelessware.org/2004/PL2004FILEUTILITIES.htm#Archives:Zip-Unzip>

All the best,
Bjorn Simonsen
Click to expand...

At the Sourceforge page, I see ver. 3.12 (W9X) as a no-install zip, but
the latest ver. 3.13 has only the install exe version.

Location for ver. 3.13 as a zip file?

Mike Sa
 
ms said:
Bjorn Simonsen wrote:

At the Sourceforge page, I see ver. 3.12 (W9X) as a no-install zip, but
the latest ver. 3.13 has only the install exe version.

Location for ver. 3.13 as a zip file?
Click to expand...

Hi Mike,

I don't think one exists. 3.13 was released *one* day after 3.12 -
note on author's site about 3.13 says "small bug fixes". Maybe try 3.12
and see if it works okay for you?

Susan
 
Susan said:
Hi Mike,

I don't think one exists. 3.13 was released *one* day after 3.12 -
note on author's site about 3.13 says "small bug fixes". Maybe try 3.12
and see if it works okay for you?

Susan
Click to expand...

Thanks, Susan.

After I d/l 3.12, it turns out the zip version is not the GUI version,
it's a DOS commandline version, not what I wanted. They should have
noted something to that effect.

Mike Sa
 
ms said:
Thanks, Susan.

After I d/l 3.12, it turns out the zip version is not the GUI version,
it's a DOS commandline version, not what I wanted. They should have
noted something to that effect.

Mike Sa
Click to expand...

Source Forge seems to have a standard set of info they furnish with DL
links. The author's DL page *does* tell you it's command line:

http://www.7-zip.org/download.html

<q>
Mirrors for downloading 7-Zip and additional packages can be accessed
from Source Forge site:

7-Zip's Source Forge Page

Additional packages contain:

* Source code of 7-Zip.
* Standalone command line version of 7-Zip that doesn't require
installation and works in Windows 95/98/ME/NT/2000/XP and in Linux via
Wine program.
* 7z Library for developers.

</q>

Susan
 
Bjorn Simonsen said:
Yes a nice one. Don't know about highest compression ratio,
Click to expand...

It doesn't have the highest compression ratio for any specific type of
data, but it scores very well in general. Also, I haven't seen a program
that has (consistant) better compression for standard ZIP archives.
 
It doesn't have the highest compression ratio for any specific type of
data, but it scores very well in general. Also, I haven't seen a program
that has (consistant) better compression for standard ZIP archives.
Click to expand...

I treated a *.png picture with 7zip and it became larger
Guenter
 
I treated a *.png picture with 7zip and it became larger
Click to expand...

There are exceptions to every rule.

The only thing against 7zip is that it isn't proven yet and as such
adoption of it isn't great. That'll come soon enough probably.
 
| Browsing the list of most downloaded software from sourceforge.net,
| I stumbled across 7-zip and liked it a lot.

|| It doesn't have the highest compression ratio for any specific type
|| of data, but it scores very well in general. Also, I haven't seen a program
|| that has (consistant) better compression for standard ZIP archives.

Cousin JanC ....

Do you have a feel for how 7-zip compares compression-wise
with the zlib compression module in Python23 that is based on GNU zip ????
 
Cousin Stanley said:
Do you have a feel for how 7-zip compares compression-wise
with the zlib compression module in Python23 that is based on GNU
zip ????
Click to expand...

Using zip-format 7-Zip seems to be a little better in my tests.
(I used zipfile.py to create .zip files in Python)

Using 7z-format it will compress clearly better almost all the time.
 
Guenter Poelz said:
I treated a *.png picture with 7zip and it became larger
Guenter
Click to expand...

A .png is already compressed, and you have to add the archive header with
the filename, etc. to that...
 
| Using zip-format 7-Zip seems to be a little better in my tests.
| (I used zipfile.py to create .zip files in Python)
|
| Using 7z-format it will compress clearly better almost all the time.

JanC ....

Thanks for the info ....
 
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