7-Zip

7-Zip 4.59 alpha 5 was released.

7-Zip for 32-bit Windows:
http://www.7-zip.org/alpha/7z459a5.exe

7-Zip for 64-bit Windows x64:
http://www.7-zip.org/alpha/7z459a5-x64.msi

What's new after 7-Zip 4.59 alpha 4:
- 7-Zip now uses less memory when it compresses big number of files.
- Some internal changes.

Don't use this alpha version for important data. Call "Test" command after each compressing operation.

Nothing for drama queen, but ratio is continous little little bit badder then 4.57.
Lost ~2KB for 1MB compressed content with my ultra settings.

I mean since 4.58 we lost slowly little bit ratio. But this is not a big question. No problem! But "we" check this betimes... ;-)

It takes 3-4 seconds to open 7z or 7z SFX archive with current alpha 5.
CPU Core 2 Quad 6600
8 GB RAM
OS: Vista x64
7-zip 4.59 alpha 5 for x64

windows explorer -> right click -> open with 7-zip... -> (pause 3..4secs) -> it's opening

Can anybody confirm it?

Best regards,

also same issue with other archive types (ZIP)

Why 7-zip for 64 bits are not abailable in NSIS installer ?

because i386 is is only architecture officially supported by NSIS. See also: http://forums.winamp.com/showthread.php?s=8b36b0d6b50e838704b2a0094d4c9d9e&threadid=253213&highlight=x64 , http://forums.winamp.com/showthread.php?s=8b36b0d6b50e838704b2a0094d4c9d9e&threadid=219084&highlight=x64 , http://sourceforge.net/project/showfiles.php?group_id=22049&package_id=15374

I have same problem. Try replace 7zFM.exe from "7zip 4.59 alpha 3" to your 7zip folder.
I hope it can be solve.

What about auto option(First time in 7-Zip - Optimized compression that automatically selects best method between lzma and ppmd, for up to 40% smaller archive size.) like in http://www.powerarchiver.com/news/