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The description of the tests are in the help file under "Standard Test Descriptions->CPU Test Suite".
For PerformanceTest V9,
The Compression Test measures the speed that the CPU can compress blocks of data into smaller blocks of data without losing any of the original data. The result is reported in Kilobytes per Second. This test uses complex data structures and complex data manipulation techniques to perform a function that is very common in software applications, ranging from backup software to Email software. The compression test uses an Adaptive encoding algorithm based on a method described by from Ian H. Witten, Radford M. Neal, and John G. Cleary in an article called “Arithmetic Coding for Data Compression”. The system uses a model which maintains the probability of each symbol being the next encoded. It reports a compression rate of 363% for English text, which is slightly better than the classic Huffman method. This tests uses memory buffers totaling about 16kb per core.
For PerformanceTest V10,
The compression test uses Crypto++ (http://www.cryptopp.com/) Gzip (based on the DEFLATE compression algorithm). A buffer of pseudo randomly generated lower case and space characters is compressed in 4 megabyte blocks. This test reports its results in Kbytes/Sec compressed.
For PerformanceTest V9,
The Compression Test measures the speed that the CPU can compress blocks of data into smaller blocks of data without losing any of the original data. The result is reported in Kilobytes per Second. This test uses complex data structures and complex data manipulation techniques to perform a function that is very common in software applications, ranging from backup software to Email software. The compression test uses an Adaptive encoding algorithm based on a method described by from Ian H. Witten, Radford M. Neal, and John G. Cleary in an article called “Arithmetic Coding for Data Compression”. The system uses a model which maintains the probability of each symbol being the next encoded. It reports a compression rate of 363% for English text, which is slightly better than the classic Huffman method. This tests uses memory buffers totaling about 16kb per core.
For PerformanceTest V10,
The compression test uses Crypto++ (http://www.cryptopp.com/) Gzip (based on the DEFLATE compression algorithm). A buffer of pseudo randomly generated lower case and space characters is compressed in 4 megabyte blocks. This test reports its results in Kbytes/Sec compressed.
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