Version 1.0.2
byte data Diff & Patch C\C++ library.
uses like this:
- create_diff(newData,oldData,out diffData);
release the diffData for update oldData.
(using LZMA or ZIP compress the diffData before release is a better option. )
- bool patch(out newData,oldData,diffData);
ok
- HDiff runs in O(oldSize+newSize) time,and requires oldSize*5+newSize+O(1) bytes of memory.
HPatch runs in O(oldSize+newSize) time,and requires oldSize+newSize+O(1) bytes of memory.
oldSize or newSize < 2G Byte.
===
HDiff1.0.0 vs BSDiff4.3 :
system: Windows7-x64 , CPU: i7 2.3G , Memroy: 6G DDR3 1600MHz, 7Zip use LZMA2
===================================================================================================================
Program Uncompressed Compressed Compressed BSDiff-4.3-x64 HDiff-1.0-x64 HDiff+bzip2 HDiff+7z
(newVersion<--oldVersion) (tar) (bzip2) (7z) (with bzip2) (Uncompressed)
-------------------------------------------------------------------------------------------------------------------
apache-maven-2.2.1-src <--2.0.11 5150720 1213258 1175464 115723 312852 105941 93996
httpd_2.4.4-netware-bin <--2.2.24 22612480 4035904 3459747 2192308 4154954 1961079 1765089
httpd-2.4.4-src <-- 2.2.24 31809536 4775534 4141266 2492534 4893630 2146854 1931397
Firefox-21.0-mac-en-US.app<--20.0 98740736 39731352 33027837 16454403 26000512 16017001 14637920
emacs-24.3 <-- 23.4 185528320 42044895 33707445 12892536 25236398 11139071 9790479
eclipse-java-juno-SR2-macosx
-cocoa-x86_64 <--x86_32 178595840 156054144 151542885 1595465 1650702 1591549 1569777
gcc-src-4.8.0 <--4.7.0 552775680 86438193 64532384 11759496 26538554 9961692 8668268
-------------------------------------------------------------------------------------------------------------------
Average Compression 100.00% 31.76% 28.47% 6.63% 12.21% 6.06% 5.46%
===================================================================================================================
================================================
Program I/O+run time(s) run memory(MB)
BSDiff HDiff BSDiff HDiff
------------------------------------------------
apache-maven... 2.1 0.5 42 29
httpd bin... 13.3 3.9 151 111
httpd src... 32.3 6.6 330 221
Firefox... 137 63 849 579
emacs... 203 47 1466 1026
eclipse 253 108 1575 1051
gcc-src... 678 111 4639 3119
------------------------------------------------
394.62% 145.47%
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