ckolivas/lrzip
1
0
Fork 0
mirror of https://github.com/ckolivas/lrzip.git synced 2026-01-10 02:19:58 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

Updated documentation.

Browse source
This commit is contained in:
Con Kolivas 2012-03-17 22:33:01 +11:00
parent 681947234e
commit 6ee7143746
3 changed files with 40 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

23
ChangeLog
View file

@ -1,4 +1,27 @@
lrzip ChangeLog
MARCH 2012, version 0.612 Con Kolivas
* Minor formatting improvement to delete misaligned %.
* Implement progress counter on zpaq compress/decompress per thread within the
Reader function.
* Add some lrzip style defines and optimisations to the lrzip functions in
libzpaq.h
* Re-instantiate the lzo compresses test for zpaq compression.
* Remove redundant code.
* Delete now-unused zpipe code.
* Implement virtual write support for bufWrite to speed up zpaq support and
simplify the virtual read function for bufRead.
* Add virtual read() support to the bufRead class to speed up encoding/decoding
via the zpaq library.
* Use libzpaq backend for decompression.
* Move zpaq compression to new libzpaq library back end.
* Merge branch 'master' into zpaq
* Add minimal libzpaq compilation support.
* Move to libzpaq directory.
* Import libzapq files.
* Fix Lrzip.h not being installed into include directory and make distcheck
failing.
MARCH 2012, version 0.611 Con Kolivas.
* Move the update counter to earlier in the hash_search so it still updates even
when there are not matches.

9
WHATS-NEW
View file

@ -1,3 +1,12 @@
lrzip-0.612
Updated to a new zpaq library back end which is faster and now supports three
different compression levels, which will be activated at lrzip levels -L 1+, 4+
and 8+. This significantly increases the maximum compression available by lrzip
with -L 9.
The include file Lrzip.h used by liblrzip is now properly installed into
$prefix/include.
lrzip-0.611
lrzcat and lrzuntar have been fixed.

17
doc/README.benchmarks
View file

@ -14,25 +14,24 @@ backend.
linux-2.6.37.tar
These are benchmarks performed on a 3GHz quad core Intel Core2 with 8GB ram
using lrzip v0.570 on an SSD drive.
using lrzip v0.612 on an SSD drive.
Compression Size Percentage Compress Decompress
None 430612480 100
7z 63636839 14.8 2m28s 0m6.6s
xz 63291156 14.7 4m02s 0m8.7
lrzip 64474279 14.9 1m27s 0m7.6s
lrzip -z 51464086 12.0 3m43s 4m11s
lrzip -l 132833903 30.8 0m23s 0m6.5s
lrzip -g 86976639 20.2 0m26s 0m6.6s
lrzip -b 72433191 16.8 0m30s 0m9.6s
lrzip 64561485 14.9 1m12s 0m4.3s
lrzip -z 51588423 12.0 2m02s 2m08s
lrzip -l 137515997 31.9 0m14s 0m2.7s
lrzip -g 86142459 20.0 0m17s 0m3.0s
lrzip -b 72103197 16.7 0m21s 0m6.5s
bzip2 74060625 17.2 0m48s 0m12.8s
gzip 94512561 21.9 0m17s 0m4.0s
These results are interesting to note the compression of lrzip by default is
about the same as 7z, but it's significantly faster thanks to its heavily
multithreaded nature. Decompression is only slightly slower because of the 2
stages in decompression. Zpaq offers by far the best compression but at the cost
multithreaded nature. Zpaq offers by far the best compression but at the cost
of extra time. However with the heavily threaded nature of lrzip, it's not a lot
longer given how much better its compression is. It's actually faster than xz
on compression on a quad core machine.
@ -134,4 +133,4 @@ Or, to make things easier, just use the default settings all the time and be
happy as lzma gives good results. :D
Con Kolivas
Fri, 25 Feb 2011
Fri, 17 Mar 2011