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Re: [OT] zip [WAS: GNU Octave 4.0.1 Released]
From: |
Tatsuro MATSUOKA |
Subject: |
Re: [OT] zip [WAS: GNU Octave 4.0.1 Released] |
Date: |
Sat, 26 Mar 2016 09:07:02 +0900 (JST) |
> From: Philip Nienhuis
> To: Tatsuro MATSUOKA ; "octave-maintainers
> Cc: @
> Date: 2016/3/25, Fri 20:19
> Subject: [OT] zip [WAS: GNU Octave 4.0.1 Released]
>
>T atsuro MATSUOKA wrote:
>> ----- Original Message -----
>>
>>> From: PhilipNienhuis
>>> To: octave-maintainers
>>> Cc:
>>> Date: 2016/3/25, Fri 16:52
>>> Subject: Re: GNU Octave 4.0.1 Released
>>>
>>> John W. Eaton wrote
>>>> The Octave developers are pleased to announce the release
>>>> of GNU Octave, version 4.0.1.
>>>>
>>>>
>>>> <snip>
>>>> An official Windows binary installer is also available from
>>>> ftp://ftp.gnu.org/gnu/octave/windows
>>>
>>> Thanks.
>>>
>>> Just curious:
>>> The Windows "zip" is 256 MB and the Windows installer 182 MB.
>>> Does the NSIS installer invoke such superior compression?
>>>
>>> Philip
>>
>>
>> I feel that zip is an out dated compression application.
>
> Quite, yes :-)
>
>> Compression ratio of many installers is higher than that of zip.
>>
>> However, as you know, zip is an only compression application that bundled
> with windows.
>
> You mean the "zip" ("Send to... compressed folder") built
> into Windows
> explorer? As to compression it's performance is, well, sub-optimal.
> Zipping up the installed octave-4.0.1 tree (32 bits + octclip package)
> to a .zip archive:
> - MSYS zip: 322 MB (not bad... but doesn't open in Windows Explorer)
> - 7-Zip : 337 MB (hmmm... I expected better)
> - Explorer: 348 MB (not unexpectedly the worst)
>
What compression algorithm do you use for 7-zip?
The compression ratio of 7-zip depends on the algorithm.
Default setting of windows 7zip file manager uses lzma compression and
high compression ratio is accomplished.
I compressed the octave-4.0.1 install folder three methods
zip bundled with windows:
356,545,692 byte
zip on msys on octave (zip -mro9):
352,808,872 byte
7 zip with the lzma algorithm
184,109,838 byte
7zip with lzma algorithm is far effective for compression.
Tatsuro