![]() For 7-zip this means for example I will use the GUI and select the Ultra compression method (which can be easily beaten with some good command line switches), WinRar will be tested with max dictionary size and solid archiving etc. The testset consists of the following file types :Ĭonsidering the fact it's supposed to be a 'real-world' test I will not look at the best possible (command-line or gui) switch combination to use for optimal compression, but only test a limited set as 'normal users' would do. Results of these compressors are marked with an 'Y' in the tarred column. The files in this TAR-file are ordered alphabetically on suffix, then name. For these programs a single TAR-file is created containing all files. Some programs like CCM and BZIP2 can only compress one file at a time. A compressor might perform bad on 1 or 2 filetypes, but on a very large collection it will not hurt as much. The idea of a large collection is filtering out the 'noise'. The set contains 100's of files and has a total size of over 300 Mb. ![]() ocx files in the set (yes, this is arbitrary). So for example there will be more txt files then. The testset should contain data, weighted (in both type and proportion of files in the set) by how often these files are used for compression by normal users using compression software. The test set contains a mix of different file types which are chosen with 'What do people use archivers for the most' in mind. This test is designed to model 'real-world' performance of lossless data compressors. ![]() # of files to compress in this test : 510 (was annoying to reformat the table - can wonder why it can't convert a html table into its own format) Summary of the multiple file compression benchmark testsįile type : Multiple file types (46 in total) The link can be found on wayback machine : ![]()
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