7-Zip 18.02 beta

[Igor Pavlov]

7-Zip 18.02 beta was released.

7-Zip for 32-bit Windows:

http://7-zip.org/a/7z1802.exe
or
http://7-zip.org/a/7z1802.msi

7-Zip for 64-bit Windows x64:

http://7-zip.org/a/7z1802-x64.exe
or
http://7-zip.org/a/7z1802-x64.msi

What's new after 7-Zip 18.01:

• The speed for single-thread LZMA/LZMA2 decoding
  was increased by 30% in x64 version and by 3% in x86 version.
• 7-Zip now can use multi-threading for 7z/LZMA2 decoding,
  if there are multiple independent data chunks in LZMA2 stream.
• 7-Zip now can use multi-threading for xz decoding,
  if there are multiple blocks in xz stream.
• New localization: Kabyle.
• Some bugs were fixed.

[Vladimir Surguchev]

It seems that LzmaDecOpt.asm missed in CPP\7zip\Bundles\Format7zF\Format7z.dsp.
Is it correct?

[Igor Pavlov]

I still use dsp (VC6) for 32-bit only.
Now LzmaDecOpt.asm is included to makefile only.
For x64 you also need _LZMA_DEC_OPT for LzmaDec.c.
makefile uses LzmaDec.mak:

!IF "$(CPU)" == "AMD64"
CFLAGS_C_SPEC = -D_LZMA_DEC_OPT
ASM_OBJS = $(ASM_OBJS) \
  $O\LzmaDecOpt.obj
!ENDIF

[Little Vulpix]

This is amazing. I'm using 7zip to generate verification sums for some xz-compressed clonezilla images and on my ryzen, the decompression went from 18MB/s to 430MB/s and it seems to be a disk bottleneck now, instead of cpu thread! Insane improvements.

[n00b]

Good job Igor. Thank you for your great work.

[Igor Pavlov]

I have created another forum thread where you can post benchmark results for 7-Zip 18.02 beta:
https://sourceforge.net/p/sevenzip/discussion/45797/thread/6d29ae53/

[n00b]

Windows 10 Pro, 7-zip 18.02 (32 & 64 bit).
xz compression not working - error: Parameter is incorrect (see attachments).
On 18.01 is OK.

[Igor Pavlov]

Yes, it's BUG.
I'll upload fixed version soon.
Thanks for report!