学步园

tag: HDiffPatch,HDiff,diff,patch,bsdiff,补丁

测试环境:  系统windows7-x64   CPU:i7 QM 2.3G  内存: 6G DDR3 1600MHz   7zip使用LZMA2算法

(HDiffPatch的说明和源代码下载: http://blog.csdn.net/housisong/article/details/9003013 )

=================================================================================================== 
         Program           Uncompressed Compressed Compressed BSDiff-4.3 HDiff-1.0-x64 HDiff  HDiff 
newVersion<--oldVersion        (tar)     (bzip2)     (7z)    -x64 +bzip2 Uncompressed  +bzip2  +7z 
--------------------------------------------------------------------------------------------------- 
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%
================================================

HDiff比BSDiff生成的diff数据更小(一般小10%以上),速度更快(一般只需要1/4时间),占用内存更小(一般只需要2/3内存);